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Properties of the Number 12378

Twelve Thousand Three Hundred Seventy-Eight

Basics

Value: 12377 → 12378 → 12379

Parity: even

Prime: No

Previous Prime: 12377

Next Prime: 12379

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 2063

Divisors: 1, 2, 3, 6, 2063, 4126, 6189, 12378

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000001011010

Octal: 30132

Duodecimal: 71B6

Hexadecimal: 305a

Square: 153214884

Square Root: 111.2564604865713

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Recamán Fibonacci variation: a(1)=1; a(2)=2; for n > 2, a(n) = a(n-1)+a(n-2)-F(n) if that number is positive and not already in the sequence, otherwise a(n) = a(n-1)+a(n-2)+F(n) where F(n) denotes the n-th Fibonacci number. A79053
Numbers k that divide the sum of digits of 21k. A175589
Triangle read by rows: T(n,k) = number of graphs on n node with edge chromatic number k (n >= 1, k >= 1). A123962
Total number of parts which are positive powers of 2 in all partitions of n. A73119
Triangle read by rows: T(n,k) (n>=0, k=0..n) gives number of connected graphs on n nodes with edge chromatic number k. A126732
Averages of twin prime pairs which can be represented as a sum of three consecutive of such pair averages. A160917
Number of aperiodic compositions of n where every pair of adjacent parts (including the last with the first) is relatively prime. A328670
a(0) = 1; thereafter a(n) = 4·n2 - 3·n + 2. A386486
Numbers that are divisible by exactly 3 primes (counted with multiplicity) and sandwiched between primes. A171179
Average of twin-prime pairs for pairs that are expressible as the sum of two triangular numbers. A117313