56805421 has 4 divisors (see below), whose sum is σ = 59795200. Its totient is φ = 53815644.

The previous prime is 56805409. The next prime is 56805433. The reversal of 56805421 is 12450865.

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 an interprime number because it is at equal distance from previous prime (56805409) and next prime (56805433).

It is a cyclic number.

It is not a de Polignac number, because 56805421 - 2⁵ = 56805389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56805401) 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, 1494861 + ... + 1494898.

It is an arithmetic number, because the mean of its divisors is an integer number (14948800).

Almost surely, 2^56805421 is an apocalyptic number.

It is an amenable number.

56805421 is a deficient number, since it is larger than the sum of its proper divisors (2989779).

56805421 is a wasteful number, since it uses less digits than its factorization.

56805421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989778.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 56805421 is about 7536.9371099937. The cubic root of 56805421 is about 384.4116972124.

The spelling of 56805421 in words is "fifty-six million, eight hundred five thousand, four hundred twenty-one".