15645361 has 2 divisors, whose sum is σ = 15645362. Its totient is φ = 15645360.

The previous prime is 15645337. The next prime is 15645403. The reversal of 15645361 is 16354651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14205361 + 1440000 = 3769^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 15645361 - 2¹⁵ = 15612593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15648361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7822680 + 7822681.

It is an arithmetic number, because the mean of its divisors is an integer number (7822681).

Almost surely, 2^15645361 is an apocalyptic number.

It is an amenable number.

15645361 is a deficient number, since it is larger than the sum of its proper divisors (1).

15645361 is an equidigital number, since it uses as much as digits as its factorization.

15645361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 15645361 is about 3955.4217221429. The cubic root of 15645361 is about 250.1085448652.

The spelling of 15645361 in words is "fifteen million, six hundred forty-five thousand, three hundred sixty-one".