15374561 has 2 divisors, whose sum is σ = 15374562. Its totient is φ = 15374560.

The previous prime is 15374479. The next prime is 15374563. The reversal of 15374561 is 16547351.

15374561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 2190400 = 3631^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 15374561 - 2¹⁸ = 15112417 is a prime.

It is a Sophie Germain prime.

Together with 15374563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p₉₉₃₃₄₄ and since 15374561 and 993344 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (15374563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7687280 + 7687281.

It is an arithmetic number, because the mean of its divisors is an integer number (7687281).

Almost surely, 2^15374561 is an apocalyptic number.

It is an amenable number.

15374561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15374561 is an equidigital number, since it uses as much as digits as its factorization.

15374561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 15374561 is about 3921.0408057045. The cubic root of 15374561 is about 248.6571249956.

The spelling of 15374561 in words is "fifteen million, three hundred seventy-four thousand, five hundred sixty-one".