56406401 has 4 divisors (see below), whose sum is σ = 56430000. Its totient is φ = 56382804.

The previous prime is 56406377. The next prime is 56406403. The reversal of 56406401 is 10460465.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10460465 = 5 ⋅2092093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56406401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56406403) 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, 7751 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (14107500).

Almost surely, 2^56406401 is an apocalyptic number.

It is an amenable number.

56406401 is a deficient number, since it is larger than the sum of its proper divisors (23599).

56406401 is a wasteful number, since it uses less digits than its factorization.

56406401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23598.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 56406401 is about 7510.4194956074. The cubic root of 56406401 is about 383.5095033135.

Adding to 56406401 its reverse (10460465), we get a palindrome (66866866).

The spelling of 56406401 in words is "fifty-six million, four hundred six thousand, four hundred one".