56721454 has 4 divisors (see below), whose sum is σ = 85082184. Its totient is φ = 28360726.

The previous prime is 56721443. The next prime is 56721487. The reversal of 56721454 is 45412765.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14180362 + ... + 14180365.

It is an arithmetic number, because the mean of its divisors is an integer number (21270546).

Almost surely, 2^56721454 is an apocalyptic number.

56721454 is a deficient number, since it is larger than the sum of its proper divisors (28360730).

56721454 is a wasteful number, since it uses less digits than its factorization.

56721454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28360729.

The product of its digits is 33600, while the sum is 34.

The square root of 56721454 is about 7531.3646837741. The cubic root of 56721454 is about 384.2221976109. Note that the first 3 decimals are identical.

It can be divided in two parts, 56721 and 454, that added together give a palindrome (57175).

The spelling of 56721454 in words is "fifty-six million, seven hundred twenty-one thousand, four hundred fifty-four".