157811142 has 64 divisors (see below), whose sum is σ = 349507584. Its totient is φ = 47329920.

The previous prime is 157811123. The next prime is 157811149. The reversal of 157811142 is 241118751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157811149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157788 + ... + 158784.

It is an arithmetic number, because the mean of its divisors is an integer number (5461056).

Almost surely, 2^157811142 is an apocalyptic number.

157811142 is an abundant number, since it is smaller than the sum of its proper divisors (191696442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157811142 is a wasteful number, since it uses less digits than its factorization.

157811142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093.

The product of its digits is 2240, while the sum is 30.

The square root of 157811142 is about 12562.2904758647. The cubic root of 157811142 is about 540.3965331632.

Adding to 157811142 its reverse (241118751), we get a palindrome (398929893).

It can be divided in two parts, 1578 and 11142, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 157811142 in words is "one hundred fifty-seven million, eight hundred eleven thousand, one hundred forty-two".