375242521 has 2 divisors, whose sum is σ = 375242522. Its totient is φ = 375242520.

The previous prime is 375242519. The next prime is 375242561. The reversal of 375242521 is 125242573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232105225 + 143137296 = 15235^2 + 11964^2 .

It is a cyclic number.

It is not a de Polignac number, because 375242521 - 2¹ = 375242519 is a prime.

Together with 375242519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (375242561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187621260 + 187621261.

It is an arithmetic number, because the mean of its divisors is an integer number (187621261).

Almost surely, 2^375242521 is an apocalyptic number.

It is an amenable number.

375242521 is a deficient number, since it is larger than the sum of its proper divisors (1).

375242521 is an equidigital number, since it uses as much as digits as its factorization.

375242521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 375242521 is about 19371.1775842358. The cubic root of 375242521 is about 721.2802075681.

The spelling of 375242521 in words is "three hundred seventy-five million, two hundred forty-two thousand, five hundred twenty-one".