75042239 has 2 divisors, whose sum is σ = 75042240. Its totient is φ = 75042238.

The previous prime is 75042197. The next prime is 75042241. The reversal of 75042239 is 93224057.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75042239 - 2¹² = 75038143 is a prime.

Together with 75042241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75042299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37521119 + 37521120.

It is an arithmetic number, because the mean of its divisors is an integer number (37521120).

Almost surely, 2^75042239 is an apocalyptic number.

75042239 is a deficient number, since it is larger than the sum of its proper divisors (1).

75042239 is an equidigital number, since it uses as much as digits as its factorization.

75042239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 75042239 is about 8662.6923643865. The cubic root of 75042239 is about 421.7954861319.

The spelling of 75042239 in words is "seventy-five million, forty-two thousand, two hundred thirty-nine".