56421445 has 4 divisors (see below), whose sum is σ = 67705740. Its totient is φ = 45137152.

The previous prime is 56421439. The next prime is 56421467. The reversal of 56421445 is 54412465.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27185796 + 29235649 = 5214^2 + 5407^2 .

It is a cyclic number.

It is not a de Polignac number, because 56421445 - 2⁵ = 56421413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5642140 + ... + 5642149.

It is an arithmetic number, because the mean of its divisors is an integer number (16926435).

Almost surely, 2^56421445 is an apocalyptic number.

It is an amenable number.

56421445 is a deficient number, since it is larger than the sum of its proper divisors (11284295).

56421445 is a wasteful number, since it uses less digits than its factorization.

56421445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284294.

The product of its digits is 19200, while the sum is 31.

The square root of 56421445 is about 7511.4209707618. The cubic root of 56421445 is about 383.5435952133.

The spelling of 56421445 in words is "fifty-six million, four hundred twenty-one thousand, four hundred forty-five".