5121657 has 8 divisors (see below), whose sum is σ = 7587680. Its totient is φ = 3414420.

The previous prime is 5121653. The next prime is 5121667. The reversal of 5121657 is 7561215.

5121657 is a `hidden beast` number, since 5 + 1 + 2 + 1 + 657 = 666.

It is not a de Polignac number, because 5121657 - 2² = 5121653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 189691 = 5121657 / (5 + 1 + 2 + 1 + 6 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5121657.

It is not an unprimeable number, because it can be changed into a prime (5121653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94819 + ... + 94872.

It is an arithmetic number, because the mean of its divisors is an integer number (948460).

Almost surely, 2^5121657 is an apocalyptic number.

It is an amenable number.

5121657 is a deficient number, since it is larger than the sum of its proper divisors (2466023).

5121657 is a wasteful number, since it uses less digits than its factorization.

5121657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189700 (or 189694 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 5121657 is about 2263.1078189074. The cubic root of 5121657 is about 172.3733664173.

It can be divided in two parts, 5121 and 657, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 5121657 in words is "five million, one hundred twenty-one thousand, six hundred fifty-seven".