128125475 has 6 divisors (see below), whose sum is σ = 158875620. Its totient is φ = 102500360.

The previous prime is 128125471. The next prime is 128125483. The reversal of 128125475 is 574521821.

It is not a de Polignac number, because 128125475 - 2² = 128125471 is a prime.

It is a super-2 number, since 2×128125475² = 32832274687951250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128125471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2562485 + ... + 2562534.

It is an arithmetic number, because the mean of its divisors is an integer number (26479270).

Almost surely, 2^128125475 is an apocalyptic number.

128125475 is a deficient number, since it is larger than the sum of its proper divisors (30750145).

128125475 is an equidigital number, since it uses as much as digits as its factorization.

128125475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125029 (or 5125024 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 128125475 is about 11319.2524046423. The cubic root of 128125475 is about 504.1330417967.

The spelling of 128125475 in words is "one hundred twenty-eight million, one hundred twenty-five thousand, four hundred seventy-five".