56430421 has 2 divisors, whose sum is σ = 56430422. Its totient is φ = 56430420.

The previous prime is 56430403. The next prime is 56430449. The reversal of 56430421 is 12403465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 4157521 = 7230^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 56430421 - 2⁵ = 56430389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56430401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28215210 + 28215211.

It is an arithmetic number, because the mean of its divisors is an integer number (28215211).

Almost surely, 2^56430421 is an apocalyptic number.

It is an amenable number.

56430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56430421 is an equidigital number, since it uses as much as digits as its factorization.

56430421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 56430421 is about 7512.0184371446. The cubic root of 56430421 is about 383.5639332530.

Adding to 56430421 its reverse (12403465), we get a palindrome (68833886).

The spelling of 56430421 in words is "fifty-six million, four hundred thirty thousand, four hundred twenty-one".