5639251 has 4 divisors (see below), whose sum is σ = 5648104. Its totient is φ = 5630400.

The previous prime is 5639243. The next prime is 5639261. The reversal of 5639251 is 1529365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1529365 = 5 ⋅305873.

It is a cyclic number.

It is not a de Polignac number, because 5639251 - 2³ = 5639243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5639261) 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, 3390 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (1412026).

Almost surely, 2^5639251 is an apocalyptic number.

5639251 is a deficient number, since it is larger than the sum of its proper divisors (8853).

5639251 is an equidigital number, since it uses as much as digits as its factorization.

5639251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8852.

The product of its digits is 8100, while the sum is 31.

The square root of 5639251 is about 2374.7107192246. The cubic root of 5639251 is about 177.9947290448.

The spelling of 5639251 in words is "five million, six hundred thirty-nine thousand, two hundred fifty-one".