47621257 has 4 divisors (see below), whose sum is σ = 48908356. Its totient is φ = 46334160.

The previous prime is 47621243. The next prime is 47621263. The reversal of 47621257 is 75212674.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27290176 + 20331081 = 5224^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 47621257 - 2¹⁹ = 47096969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47621207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643494 + ... + 643567.

It is an arithmetic number, because the mean of its divisors is an integer number (12227089).

Almost surely, 2^47621257 is an apocalyptic number.

It is an amenable number.

47621257 is a deficient number, since it is larger than the sum of its proper divisors (1287099).

47621257 is a wasteful number, since it uses less digits than its factorization.

47621257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287098.

The product of its digits is 23520, while the sum is 34.

The square root of 47621257 is about 6900.8156764255. The cubic root of 47621257 is about 362.4657299351.

The spelling of 47621257 in words is "forty-seven million, six hundred twenty-one thousand, two hundred fifty-seven".