56121401 has 4 divisors (see below), whose sum is σ = 64138752. Its totient is φ = 48104052.

The previous prime is 56121391. The next prime is 56121413. The reversal of 56121401 is 10412165.

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 56121401 - 2¹⁴ = 56105017 is a prime.

It is a super-2 number, since 2×56121401² = 6299223300405602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56121491) 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, 4008665 + ... + 4008678.

It is an arithmetic number, because the mean of its divisors is an integer number (16034688).

Almost surely, 2^56121401 is an apocalyptic number.

It is an amenable number.

56121401 is a deficient number, since it is larger than the sum of its proper divisors (8017351).

56121401 is an equidigital number, since it uses as much as digits as its factorization.

56121401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8017350.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 56121401 is about 7491.4218276640. The cubic root of 56121401 is about 382.8625033924.

Adding to 56121401 its reverse (10412165), we get a palindrome (66533566).

The spelling of 56121401 in words is "fifty-six million, one hundred twenty-one thousand, four hundred one".