5621657 has 8 divisors (see below), whose sum is σ = 5810184. Its totient is φ = 5436288.

The previous prime is 5621653. The next prime is 5621687. The reversal of 5621657 is 7561265.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3200521 + 2421136 = 1789^2 + 1556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5621657 - 2² = 5621653 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 (5621653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3143 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (726273).

Almost surely, 2^5621657 is an apocalyptic number.

It is an amenable number.

5621657 is a deficient number, since it is larger than the sum of its proper divisors (188527).

5621657 is a wasteful number, since it uses less digits than its factorization.

5621657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579.

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

The square root of 5621657 is about 2371.0033741014. The cubic root of 5621657 is about 177.8094265558.

The spelling of 5621657 in words is "five million, six hundred twenty-one thousand, six hundred fifty-seven".