472540645 has 16 divisors (see below), whose sum is σ = 588242160. Its totient is φ = 363976704.

The previous prime is 472540637. The next prime is 472540669. The reversal of 472540645 is 546045274.

It is a Cunningham number, because it is equal to 21738²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 4553956 + 467986689 = 2134^2 + 21633^2 .

It is a cyclic number.

It is not a de Polignac number, because 472540645 - 2³ = 472540637 is a prime.

It is a super-2 number, since 2×472540645² = 446589322354032050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49717 + ... + 58453.

It is an arithmetic number, because the mean of its divisors is an integer number (36765135).

Almost surely, 2^472540645 is an apocalyptic number.

It is an amenable number.

472540645 is a deficient number, since it is larger than the sum of its proper divisors (115701515).

472540645 is a wasteful number, since it uses less digits than its factorization.

472540645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144.

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 472540645 is about 21738.0000230012. Note that the first 4 decimals coincide. The cubic root of 472540645 is about 778.8964478567.

The spelling of 472540645 in words is "four hundred seventy-two million, five hundred forty thousand, six hundred forty-five".