15320401 has 4 divisors (see below), whose sum is σ = 15375204. Its totient is φ = 15265600.

The previous prime is 15320377. The next prime is 15320407. The reversal of 15320401 is 10402351.

15320401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10402351 = 17 ⋅611903.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 7049025 = 2876^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 15320401 - 2⁷ = 15320273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320407) 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, 26980 + ... + 27541.

It is an arithmetic number, because the mean of its divisors is an integer number (3843801).

Almost surely, 2^15320401 is an apocalyptic number.

It is an amenable number.

15320401 is a deficient number, since it is larger than the sum of its proper divisors (54803).

15320401 is an equidigital number, since it uses as much as digits as its factorization.

15320401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54802.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 15320401 is about 3914.1283831780. The cubic root of 15320401 is about 248.3647998003.

Adding to 15320401 its reverse (10402351), we get a palindrome (25722752).

The spelling of 15320401 in words is "fifteen million, three hundred twenty thousand, four hundred one".