157472785 has 8 divisors (see below), whose sum is σ = 200083176. Its totient is φ = 118567680.

The previous prime is 157472747. The next prime is 157472801. The reversal of 157472785 is 587274751.

It can be written as a sum of positive squares in 4 ways, for example, as 49956624 + 107516161 = 7068^2 + 10369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157472785 - 2¹⁹ = 156948497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 926226 + ... + 926395.

It is an arithmetic number, because the mean of its divisors is an integer number (25010397).

Almost surely, 2^157472785 is an apocalyptic number.

It is an amenable number.

157472785 is a deficient number, since it is larger than the sum of its proper divisors (42610391).

157472785 is a wasteful number, since it uses less digits than its factorization.

157472785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852643.

The product of its digits is 548800, while the sum is 46.

The square root of 157472785 is about 12548.8160796148. The cubic root of 157472785 is about 540.0100421086.

The spelling of 157472785 in words is "one hundred fifty-seven million, four hundred seventy-two thousand, seven hundred eighty-five".