15206401 has 4 divisors (see below), whose sum is σ = 17378752. Its totient is φ = 13034052.

The previous prime is 15206383. The next prime is 15206413. The reversal of 15206401 is 10460251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15206401 - 2⁵ = 15206369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15206491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086165 + ... + 1086178.

It is an arithmetic number, because the mean of its divisors is an integer number (4344688).

Almost surely, 2^15206401 is an apocalyptic number.

It is an amenable number.

15206401 is a deficient number, since it is larger than the sum of its proper divisors (2172351).

15206401 is an equidigital number, since it uses as much as digits as its factorization.

15206401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172350.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 15206401 is about 3899.5385624456. The cubic root of 15206401 is about 247.7472331403.

Adding to 15206401 its reverse (10460251), we get a palindrome (25666652).

It can be divided in two parts, 1520 and 6401, that added together give a square (7921 = 89²).

The spelling of 15206401 in words is "fifteen million, two hundred six thousand, four hundred one".