15871401 has 24 divisors (see below), whose sum is σ = 28217280. Its totient is φ = 8371296.

The previous prime is 15871379. The next prime is 15871423. The reversal of 15871401 is 10417851.

It is an interprime number because it is at equal distance from previous prime (15871379) and next prime (15871423).

It is not a de Polignac number, because 15871401 - 2⁵ = 15871369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15871451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8871 + ... + 10508.

It is an arithmetic number, because the mean of its divisors is an integer number (1175720).

Almost surely, 2^15871401 is an apocalyptic number.

It is an amenable number.

15871401 is a deficient number, since it is larger than the sum of its proper divisors (12345879).

15871401 is a wasteful number, since it uses less digits than its factorization.

15871401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19405 (or 19402 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 15871401 is about 3983.8926943380. The cubic root of 15871401 is about 251.3072907150.

The spelling of 15871401 in words is "fifteen million, eight hundred seventy-one thousand, four hundred one".