157242120 has 64 divisors (see below), whose sum is σ = 539118720. Its totient is φ = 35940864.

The previous prime is 157242091. The next prime is 157242133. The reversal of 157242120 is 21242751.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92757 + ... + 94436.

It is an arithmetic number, because the mean of its divisors is an integer number (8423730).

Almost surely, 2^157242120 is an apocalyptic number.

157242120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157242120 is an abundant number, since it is smaller than the sum of its proper divisors (381876600).

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

157242120 is a wasteful number, since it uses less digits than its factorization.

157242120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187214 (or 187210 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 157242120 is about 12539.6220038724. The cubic root of 157242120 is about 539.7462456590.

Adding to 157242120 its reverse (21242751), we get a palindrome (178484871).

The spelling of 157242120 in words is "one hundred fifty-seven million, two hundred forty-two thousand, one hundred twenty".