15901261 has 2 divisors, whose sum is σ = 15901262. Its totient is φ = 15901260.

The previous prime is 15901253. The next prime is 15901279. The reversal of 15901261 is 16210951.

15901261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15848361 + 52900 = 3981^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 15901261 - 2³ = 15901253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15901241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7950630 + 7950631.

It is an arithmetic number, because the mean of its divisors is an integer number (7950631).

Almost surely, 2^15901261 is an apocalyptic number.

It is an amenable number.

15901261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15901261 is an equidigital number, since it uses as much as digits as its factorization.

15901261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 15901261 is about 3987.6385242396. The cubic root of 15901261 is about 251.4647927665.

The spelling of 15901261 in words is "fifteen million, nine hundred one thousand, two hundred sixty-one".