15399901 has 8 divisors (see below), whose sum is σ = 17342208. Its totient is φ = 13548000.

The previous prime is 15399869. The next prime is 15399929. The reversal of 15399901 is 10999351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15399901 - 2⁵ = 15399869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15399931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22240 + ... + 22921.

It is an arithmetic number, because the mean of its divisors is an integer number (2167776).

Almost surely, 2^15399901 is an apocalyptic number.

15399901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15399901 is a deficient number, since it is larger than the sum of its proper divisors (1942307).

15399901 is a wasteful number, since it uses less digits than its factorization.

15399901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45203.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 15399901 is about 3924.2707602815. The cubic root of 15399901 is about 248.7936603414.

The spelling of 15399901 in words is "fifteen million, three hundred ninety-nine thousand, nine hundred one".