856512145 has 16 divisors (see below), whose sum is σ = 1047191040. Its totient is φ = 672336000.

The previous prime is 856512143. The next prime is 856512169. The reversal of 856512145 is 541215658.

It is not a de Polignac number, because 856512145 - 2¹ = 856512143 is a prime.

It is a super-2 number, since 2×856512145² = 1467226109065002050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (856512143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174880 + ... + 179710.

It is an arithmetic number, because the mean of its divisors is an integer number (65449440).

Almost surely, 2^856512145 is an apocalyptic number.

It is an amenable number.

856512145 is a deficient number, since it is larger than the sum of its proper divisors (190678895).

856512145 is a wasteful number, since it uses less digits than its factorization.

856512145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496.

The product of its digits is 48000, while the sum is 37.

The square root of 856512145 is about 29266.2287457745. The cubic root of 856512145 is about 949.6812023569.

The spelling of 856512145 in words is "eight hundred fifty-six million, five hundred twelve thousand, one hundred forty-five".