857354155 has 16 divisors (see below), whose sum is σ = 1187446464. Its totient is φ = 582076800.

The previous prime is 857354153. The next prime is 857354159. The reversal of 857354155 is 551453758.

It is a happy number.

It is not a de Polignac number, because 857354155 - 2¹ = 857354153 is a prime.

It is a super-2 number, since 2×857354155² = 1470112294191528050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857354153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117732 + ... + 124801.

It is an arithmetic number, because the mean of its divisors is an integer number (74215404).

Almost surely, 2^857354155 is an apocalyptic number.

857354155 is a deficient number, since it is larger than the sum of its proper divisors (330092309).

857354155 is a wasteful number, since it uses less digits than its factorization.

857354155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242646.

The product of its digits is 420000, while the sum is 43.

The square root of 857354155 is about 29280.6105639893. The cubic root of 857354155 is about 949.9923009533.

The spelling of 857354155 in words is "eight hundred fifty-seven million, three hundred fifty-four thousand, one hundred fifty-five".