75125257 has 4 divisors (see below), whose sum is σ = 76872400. Its totient is φ = 73378116.

The previous prime is 75125251. The next prime is 75125279. The reversal of 75125257 is 75252157.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75252157 = 1693 ⋅44449.

It is a cyclic number.

It is not a de Polignac number, because 75125257 - 2¹⁹ = 74600969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75125251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873507 + ... + 873592.

It is an arithmetic number, because the mean of its divisors is an integer number (19218100).

Almost surely, 2^75125257 is an apocalyptic number.

It is an amenable number.

75125257 is a deficient number, since it is larger than the sum of its proper divisors (1747143).

75125257 is a wasteful number, since it uses less digits than its factorization.

75125257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747142.

The product of its digits is 24500, while the sum is 34.

The square root of 75125257 is about 8667.4827372196. The cubic root of 75125257 is about 421.9509706221.

It can be divided in two parts, 7512 and 5257, that added together give a square (12769 = 113²).

The spelling of 75125257 in words is "seventy-five million, one hundred twenty-five thousand, two hundred fifty-seven".