128504157 has 12 divisors (see below), whose sum is σ = 175070976. Its totient is φ = 83842360.

The previous prime is 128504153. The next prime is 128504161. The reversal of 128504157 is 751405821.

It is an interprime number because it is at equal distance from previous prime (128504153) and next prime (128504161).

It is not a de Polignac number, because 128504157 - 2² = 128504153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128504153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3069 + ... + 16322.

It is an arithmetic number, because the mean of its divisors is an integer number (14589248).

Almost surely, 2^128504157 is an apocalyptic number.

It is an amenable number.

128504157 is a deficient number, since it is larger than the sum of its proper divisors (46566819).

128504157 is an equidigital number, since it uses as much as digits as its factorization.

128504157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19488 (or 19441 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 128504157 is about 11335.9674046814. The cubic root of 128504157 is about 504.6292177493.

Adding to 128504157 its reverse (751405821), we get a palindrome (879909978).

The spelling of 128504157 in words is "one hundred twenty-eight million, five hundred four thousand, one hundred fifty-seven".