156709145 has 16 divisors (see below), whose sum is σ = 199512720. Its totient is φ = 117755904.

The previous prime is 156709129. The next prime is 156709177. The reversal of 156709145 is 541907651.

It can be written as a sum of positive squares in 8 ways, for example, as 259081 + 156450064 = 509^2 + 12508^2 .

It is a cyclic number.

It is not a de Polignac number, because 156709145 - 2⁴ = 156709129 is a prime.

It is a super-2 number, since 2×156709145² = 49115512253262050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156709099 and 156709108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48851 + ... + 51959.

It is an arithmetic number, because the mean of its divisors is an integer number (12469545).

Almost surely, 2^156709145 is an apocalyptic number.

It is an amenable number.

156709145 is a deficient number, since it is larger than the sum of its proper divisors (42803575).

156709145 is a wasteful number, since it uses less digits than its factorization.

156709145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 156709145 is about 12518.3523276827. The cubic root of 156709145 is about 539.1357288098.

The spelling of 156709145 in words is "one hundred fifty-six million, seven hundred nine thousand, one hundred forty-five".