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Properties of the Number 146

One Hundred Forty-Six

Basics

Value: 145 → 146 → 147

Parity: even

Prime: No

Previous Prime: 139

Next Prime: 149

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 73

Divisors: 1, 2, 73, 146

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010010

Octal: 222

Duodecimal: 102

Hexadecimal: 92

Square: 21316

Square Root: 12.083045973594572

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

Semiprimes (or biprimes): products of two primes. A1358
Squarefree semiprimes: Numbers that are the product of two distinct primes. A6881
a(n) = ∑k=1..n floor(n/k); also ∑k=1..n d(k), where d = number of divisors (A000005); also number of solutions to x·y = z with 1 <= x,y,z <= n. A6218
Upper Wythoff sequence (a Beatty sequence): a(n) = floor(n*φ2), where φ = (1+sqrt(5))/2. A1950
Fibbinary numbers: if n = F(i1) + F(i2) + ... + F(ik) is the Zeckendorf representation of n (i.e., write n in Fibonacci number system) then a(n) = 2i1 - 2 + 2i2 - 2 + ... + 2ik - 2. Also numbers whose binary representation contains no two adjacent 1's. A3714
Numbers that are the sum of 2 squares. A1481
Numbers that are the sum of 2 nonzero squares. A404
Positive integers congruent to 2 (mod 4): a(n) = 4·n+2, for n >= 0. A16825
The primes doubled; even semiprimes. A100484
a(n) = ∑ d divides n q(d), where q(d) = A000009 = number of partitions of d into distinct parts. A47966

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