75278125 has 48 divisors (see below), whose sum is σ = 108274320. Its totient is φ = 51840000.

The previous prime is 75278101. The next prime is 75278129. The reversal of 75278125 is 52187257.

It can be written as a sum of positive squares in 24 ways, for example, as 68657796 + 6620329 = 8286^2 + 2573^2 .

It is not a de Polignac number, because 75278125 - 2²¹ = 73180973 is a prime.

It is a super-2 number, since 2×75278125² = 11333592207031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75278129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 690571 + ... + 690679.

It is an arithmetic number, because the mean of its divisors is an integer number (2255715).

Almost surely, 2^75278125 is an apocalyptic number.

It is an amenable number.

75278125 is a deficient number, since it is larger than the sum of its proper divisors (32996195).

75278125 is a wasteful number, since it uses less digits than its factorization.

75278125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 144 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 75278125 is about 8676.2967330538. The cubic root of 75278125 is about 422.2369778495.

The spelling of 75278125 in words is "seventy-five million, two hundred seventy-eight thousand, one hundred twenty-five".