156404249 has 4 divisors (see below), whose sum is σ = 157190400. Its totient is φ = 155618100.

The previous prime is 156404189. The next prime is 156404263. The reversal of 156404249 is 942404651.

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.

It is a cyclic number.

It is not a de Polignac number, because 156404249 - 2¹⁶ = 156338713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156403249) 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, 392777 + ... + 393174.

It is an arithmetic number, because the mean of its divisors is an integer number (39297600).

Almost surely, 2^156404249 is an apocalyptic number.

It is an amenable number.

156404249 is a deficient number, since it is larger than the sum of its proper divisors (786151).

156404249 is an equidigital number, since it uses as much as digits as its factorization.

156404249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786150.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 156404249 is about 12506.1684380149. The cubic root of 156404249 is about 538.7858512290.

The spelling of 156404249 in words is "one hundred fifty-six million, four hundred four thousand, two hundred forty-nine".