156145729 has 4 divisors (see below), whose sum is σ = 161182720. Its totient is φ = 151108740.

The previous prime is 156145727. The next prime is 156145733. The reversal of 156145729 is 927541651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927541651 = 25087 ⋅36973.

It is a cyclic number.

It is not a de Polignac number, because 156145729 - 2¹ = 156145727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156145691 and 156145700.

It is not an unprimeable number, because it can be changed into a prime (156145721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518449 + ... + 2518510.

It is an arithmetic number, because the mean of its divisors is an integer number (40295680).

Almost surely, 2^156145729 is an apocalyptic number.

It is an amenable number.

156145729 is a deficient number, since it is larger than the sum of its proper divisors (5036991).

156145729 is an equidigital number, since it uses as much as digits as its factorization.

156145729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036990.

The product of its digits is 75600, while the sum is 40.

The square root of 156145729 is about 12495.8284639315. The cubic root of 156145729 is about 538.4888351484.

The spelling of 156145729 in words is "one hundred fifty-six million, one hundred forty-five thousand, seven hundred twenty-nine".