15398901 has 24 divisors (see below), whose sum is σ = 25843584. Its totient is φ = 8652960.

The previous prime is 15398893. The next prime is 15398959. The reversal of 15398901 is 10989351.

It is a happy number.

It is not a de Polignac number, because 15398901 - 2³ = 15398893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15394901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1840 + ... + 5846.

It is an arithmetic number, because the mean of its divisors is an integer number (1076816).

Almost surely, 2^15398901 is an apocalyptic number.

It is an amenable number.

15398901 is a deficient number, since it is larger than the sum of its proper divisors (10444683).

15398901 is a wasteful number, since it uses less digits than its factorization.

15398901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4078 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 15398901 is about 3924.1433460056. The cubic root of 15398901 is about 248.7882750460.

It can be divided in two parts, 1539 and 8901, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 15398901 in words is "fifteen million, three hundred ninety-eight thousand, nine hundred one".