56454021 has 12 divisors (see below), whose sum is σ = 87817548. Its totient is φ = 34740864.

The previous prime is 56453993. The next prime is 56454031. The reversal of 56454021 is 12045465.

It can be written as a sum of positive squares in 2 ways, for example, as 25250625 + 31203396 = 5025^2 + 5586^2 .

It is not a de Polignac number, because 56454021 - 2¹⁹ = 55929733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56454031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241140 + ... + 241373.

It is an arithmetic number, because the mean of its divisors is an integer number (7318129).

Almost surely, 2^56454021 is an apocalyptic number.

It is an amenable number.

56454021 is a deficient number, since it is larger than the sum of its proper divisors (31363527).

56454021 is a wasteful number, since it uses less digits than its factorization.

56454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482532 (or 482529 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 56454021 is about 7513.5890891105. The cubic root of 56454021 is about 383.6173964209.

Adding to 56454021 its reverse (12045465), we get a palindrome (68499486).

The spelling of 56454021 in words is "fifty-six million, four hundred fifty-four thousand, twenty-one".