15074565421 has 2 divisors, whose sum is σ = 15074565422. Its totient is φ = 15074565420.

The previous prime is 15074565413. The next prime is 15074565437. The reversal of 15074565421 is 12456547051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8749544521 + 6325020900 = 93539^2 + 79530^2 .

It is a cyclic number.

It is not a de Polignac number, because 15074565421 - 2³ = 15074565413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15074565461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7537282710 + 7537282711.

It is an arithmetic number, because the mean of its divisors is an integer number (7537282711).

Almost surely, 2^15074565421 is an apocalyptic number.

It is an amenable number.

15074565421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15074565421 is an equidigital number, since it uses as much as digits as its factorization.

15074565421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 15074565421 in words is "fifteen billion, seventy-four million, five hundred sixty-five thousand, four hundred twenty-one".