5661251 has 12 divisors (see below), whose sum is σ = 6029496. Its totient is φ = 5312160.

The previous prime is 5661247. The next prime is 5661277. The reversal of 5661251 is 1521665.

It is not a de Polignac number, because 5661251 - 2² = 5661247 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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 5661251.

It is not an unprimeable number, because it can be changed into a prime (5661281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41255 + ... + 41391.

It is an arithmetic number, because the mean of its divisors is an integer number (502458).

Almost surely, 2^5661251 is an apocalyptic number.

5661251 is a deficient number, since it is larger than the sum of its proper divisors (368245).

5661251 is a wasteful number, since it uses less digits than its factorization.

5661251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 211 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 5661251 is about 2379.3383534084. The cubic root of 5661251 is about 178.2258946609.

The spelling of 5661251 in words is "five million, six hundred sixty-one thousand, two hundred fifty-one".