75542139 has 24 divisors (see below), whose sum is σ = 113650992. Its totient is φ = 50142240.

The previous prime is 75542087. The next prime is 75542153. The reversal of 75542139 is 93124557.

It is not a de Polignac number, because 75542139 - 2²⁰ = 74493563 is a prime.

It is a super-2 number, since 2×75542139² = 11413229529390642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75542239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70669 + ... + 71729.

It is an arithmetic number, because the mean of its divisors is an integer number (4735458).

Almost surely, 2^75542139 is an apocalyptic number.

75542139 is a deficient number, since it is larger than the sum of its proper divisors (38108853).

75542139 is a wasteful number, since it uses less digits than its factorization.

75542139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369 (or 1357 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 75542139 is about 8691.4980872114. The cubic root of 75542139 is about 422.7300223830.

The spelling of 75542139 in words is "seventy-five million, five hundred forty-two thousand, one hundred thirty-nine".