75240143 has 4 divisors (see below), whose sum is σ = 82080168. Its totient is φ = 68400120.

The previous prime is 75240119. The next prime is 75240149. The reversal of 75240143 is 34104257.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75240143 - 2⁸ = 75239887 is a prime.

It is a super-2 number, since 2×75240143² = 11322158237320898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75240149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3419996 + ... + 3420017.

It is an arithmetic number, because the mean of its divisors is an integer number (20520042).

Almost surely, 2^75240143 is an apocalyptic number.

75240143 is a deficient number, since it is larger than the sum of its proper divisors (6840025).

75240143 is a wasteful number, since it uses less digits than its factorization.

75240143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840024.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 75240143 is about 8674.1076198074. The cubic root of 75240143 is about 422.1659518912.

The spelling of 75240143 in words is "seventy-five million, two hundred forty thousand, one hundred forty-three".