157428122 has 4 divisors (see below), whose sum is σ = 236142186. Its totient is φ = 78714060.

The previous prime is 157428113. The next prime is 157428133. The reversal of 157428122 is 221824751.

157428122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 157226521 + 201601 = 12539^2 + 449^2 .

It is a super-2 number, since 2×157428122² = 49567227192893768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39357029 + ... + 39357032.

Almost surely, 2^157428122 is an apocalyptic number.

157428122 is a deficient number, since it is larger than the sum of its proper divisors (78714064).

157428122 is an equidigital number, since it uses as much as digits as its factorization.

157428122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78714063.

The product of its digits is 8960, while the sum is 32.

The square root of 157428122 is about 12547.0363831464. The cubic root of 157428122 is about 539.9589840818.

The spelling of 157428122 in words is "one hundred fifty-seven million, four hundred twenty-eight thousand, one hundred twenty-two".