75240961 has 2 divisors, whose sum is σ = 75240962. Its totient is φ = 75240960.

The previous prime is 75240959. The next prime is 75240967. The reversal of 75240961 is 16904257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 591361 = 8640^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 75240961 - 2¹ = 75240959 is a prime.

It is a super-2 number, since 2×75240961² = 11322404424407042, which contains 22 as substring.

Together with 75240959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75240967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37620480 + 37620481.

It is an arithmetic number, because the mean of its divisors is an integer number (37620481).

Almost surely, 2^75240961 is an apocalyptic number.

It is an amenable number.

75240961 is a deficient number, since it is larger than the sum of its proper divisors (1).

75240961 is an equidigital number, since it uses as much as digits as its factorization.

75240961 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 34.

The square root of 75240961 is about 8674.1547715037. The cubic root of 75240961 is about 422.1674817948.

The spelling of 75240961 in words is "seventy-five million, two hundred forty thousand, nine hundred sixty-one".