128162157 has 8 divisors (see below), whose sum is σ = 171636576. Its totient is φ = 85064592.

The previous prime is 128162143. The next prime is 128162161. The reversal of 128162157 is 751261821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128162157 - 2¹⁰ = 128161133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128162057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93418 + ... + 94779.

It is an arithmetic number, because the mean of its divisors is an integer number (21454572).

Almost surely, 2^128162157 is an apocalyptic number.

It is an amenable number.

128162157 is a deficient number, since it is larger than the sum of its proper divisors (43474419).

128162157 is a wasteful number, since it uses less digits than its factorization.

128162157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188427.

The product of its digits is 6720, while the sum is 33.

The square root of 128162157 is about 11320.8726253765. The cubic root of 128162157 is about 504.1811478784.

The spelling of 128162157 in words is "one hundred twenty-eight million, one hundred sixty-two thousand, one hundred fifty-seven".