472725621 has 6 divisors (see below), whose sum is σ = 682825910. Its totient is φ = 315150408.

The previous prime is 472725611. The next prime is 472725677. The reversal of 472725621 is 126527274.

It is a happy number.

472725621 is a `hidden beast` number, since 4 + 7 + 2 + 7 + 25 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 276024996 + 196700625 = 16614^2 + 14025^2 .

It is not a de Polignac number, because 472725621 - 2⁶ = 472725557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472725611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26262526 + ... + 26262543.

Almost surely, 2^472725621 is an apocalyptic number.

It is an amenable number.

472725621 is a deficient number, since it is larger than the sum of its proper divisors (210100289).

472725621 is a wasteful number, since it uses less digits than its factorization.

472725621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52525075 (or 52525072 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 472725621 is about 21742.2542759485. The cubic root of 472725621 is about 778.9980675835.

The spelling of 472725621 in words is "four hundred seventy-two million, seven hundred twenty-five thousand, six hundred twenty-one".