75374721 has 12 divisors (see below), whose sum is σ = 109171348. Its totient is φ = 50112864.

The previous prime is 75374701. The next prime is 75374731. The reversal of 75374721 is 12747357.

It can be written as a sum of positive squares in 2 ways, for example, as 22667121 + 52707600 = 4761^2 + 7260^2 .

It is not a de Polignac number, because 75374721 - 2¹¹ = 75372673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75374701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7870 + ... + 14583.

Almost surely, 2^75374721 is an apocalyptic number.

It is an amenable number.

75374721 is a deficient number, since it is larger than the sum of its proper divisors (33796627).

75374721 is a wasteful number, since it uses less digits than its factorization.

75374721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22832 (or 22829 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 75374721 is about 8681.8616091251. The cubic root of 75374721 is about 422.4175038212.

The spelling of 75374721 in words is "seventy-five million, three hundred seventy-four thousand, seven hundred twenty-one".