5661257 has 4 divisors (see below), whose sum is σ = 6470016. Its totient is φ = 4852500.

The previous prime is 5661247. The next prime is 5661277. The reversal of 5661257 is 7521665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5661257 - 2⁸ = 5661001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661217) 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, 404369 + ... + 404382.

It is an arithmetic number, because the mean of its divisors is an integer number (1617504).

Almost surely, 2^5661257 is an apocalyptic number.

It is an amenable number.

5661257 is a deficient number, since it is larger than the sum of its proper divisors (808759).

5661257 is an equidigital number, since it uses as much as digits as its factorization.

5661257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808758.

The product of its digits is 12600, while the sum is 32.

The square root of 5661257 is about 2379.3396142627. The cubic root of 5661257 is about 178.2259576243.

The spelling of 5661257 in words is "five million, six hundred sixty-one thousand, two hundred fifty-seven".