15801601 has 2 divisors, whose sum is σ = 15801602. Its totient is φ = 15801600.

The previous prime is 15801589. The next prime is 15801629. The reversal of 15801601 is 10610851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10400625 + 5400976 = 3225^2 + 2324^2 .

It is a cyclic number.

It is not a de Polignac number, because 15801601 - 2¹³ = 15793409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15801641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7900800 + 7900801.

It is an arithmetic number, because the mean of its divisors is an integer number (7900801).

Almost surely, 2^15801601 is an apocalyptic number.

It is an amenable number.

15801601 is a deficient number, since it is larger than the sum of its proper divisors (1).

15801601 is an equidigital number, since it uses as much as digits as its factorization.

15801601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 15801601 is about 3975.1227653998. The cubic root of 15801601 is about 250.9383456235.

The spelling of 15801601 in words is "fifteen million, eight hundred one thousand, six hundred one".