75128125 has 24 divisors (see below), whose sum is σ = 97259400. Its totient is φ = 57960000.

The previous prime is 75128101. The next prime is 75128161. The reversal of 75128125 is 52182157.

It can be written as a sum of positive squares in 12 ways, for example, as 74545956 + 582169 = 8634^2 + 763^2 .

It is not a de Polignac number, because 75128125 - 2²¹ = 73030973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90211 + ... + 91039.

It is an arithmetic number, because the mean of its divisors is an integer number (4052475).

Almost surely, 2^75128125 is an apocalyptic number.

It is an amenable number.

75128125 is a deficient number, since it is larger than the sum of its proper divisors (22131275).

75128125 is an frugal number, since it uses more digits than its factorization.

75128125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 863 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 75128125 is about 8667.6481816004. The cubic root of 75128125 is about 421.9563400546.

The spelling of 75128125 in words is "seventy-five million, one hundred twenty-eight thousand, one hundred twenty-five".