157620259 has 4 divisors (see below), whose sum is σ = 161880304. Its totient is φ = 153360216.

The previous prime is 157620233. The next prime is 157620289. The reversal of 157620259 is 952026751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157620259 - 2⁷ = 157620131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 4260007 = 157620259 / (1 + 5 + 7 + 6 + 2 + 0 + 2 + 5 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157620289) 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, 2129967 + ... + 2130040.

It is an arithmetic number, because the mean of its divisors is an integer number (40470076).

Almost surely, 2^157620259 is an apocalyptic number.

157620259 is a deficient number, since it is larger than the sum of its proper divisors (4260045).

157620259 is an equidigital number, since it uses as much as digits as its factorization.

157620259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260044.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 157620259 is about 12554.6907170189. The cubic root of 157620259 is about 540.1785634896.

The spelling of 157620259 in words is "one hundred fifty-seven million, six hundred twenty thousand, two hundred fifty-nine".