75142489 has 2 divisors, whose sum is σ = 75142490. Its totient is φ = 75142488.

The previous prime is 75142453. The next prime is 75142603. The reversal of 75142489 is 98424157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75116889 + 25600 = 8667^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 75142489 - 2⁹ = 75141977 is a prime.

It is not a weakly prime, because it can be changed into another prime (75142439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37571244 + 37571245.

It is an arithmetic number, because the mean of its divisors is an integer number (37571245).

Almost surely, 2^75142489 is an apocalyptic number.

It is an amenable number.

75142489 is a deficient number, since it is larger than the sum of its proper divisors (1).

75142489 is an equidigital number, since it uses as much as digits as its factorization.

75142489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 75142489 is about 8668.4767404660. The cubic root of 75142489 is about 421.9832300936.

The spelling of 75142489 in words is "seventy-five million, one hundred forty-two thousand, four hundred eighty-nine".