13561401 has 16 divisors (see below), whose sum is σ = 20738048. Its totient is φ = 7722000.

The previous prime is 13561397. The next prime is 13561409. The reversal of 13561401 is 10416531.

It is not a de Polignac number, because 13561401 - 2² = 13561397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13561409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5976 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (1296128).

Almost surely, 2^13561401 is an apocalyptic number.

It is an amenable number.

13561401 is a deficient number, since it is larger than the sum of its proper divisors (7176647).

13561401 is a wasteful number, since it uses less digits than its factorization.

13561401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13561401 is about 3682.5807526788. The cubic root of 13561401 is about 238.4706045194.

Adding to 13561401 its reverse (10416531), we get a palindrome (23977932).

The spelling of 13561401 in words is "thirteen million, five hundred sixty-one thousand, four hundred one".