75140865 has 20 divisors (see below), whose sum is σ = 134697684. Its totient is φ = 40074912.

The previous prime is 75140861. The next prime is 75140873. The reversal of 75140865 is 56804157.

It can be written as a sum of positive squares in 2 ways, for example, as 13549761 + 61591104 = 3681^2 + 7848^2 .

It is not a de Polignac number, because 75140865 - 2² = 75140861 is a prime.

It is a super-2 number, since 2×75140865² = 11292299185896450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75140861) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92362 + ... + 93171.

Almost surely, 2^75140865 is an apocalyptic number.

It is an amenable number.

75140865 is a deficient number, since it is larger than the sum of its proper divisors (59556819).

75140865 is a wasteful number, since it uses less digits than its factorization.

75140865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185550 (or 185541 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 75140865 is about 8668.3830672162. The cubic root of 75140865 is about 421.9801900661.

It can be divided in two parts, 751 and 40865, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 75140865 in words is "seventy-five million, one hundred forty thousand, eight hundred sixty-five".