5261639 has 4 divisors (see below), whose sum is σ = 5266800. Its totient is φ = 5256480.

The previous prime is 5261629. The next prime is 5261647. The reversal of 5261639 is 9361625.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5261639 - 2⁴ = 5261623 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 (5261629) 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, 482 + ... + 3279.

It is an arithmetic number, because the mean of its divisors is an integer number (1316700).

Almost surely, 2^5261639 is an apocalyptic number.

5261639 is a deficient number, since it is larger than the sum of its proper divisors (5161).

5261639 is a wasteful number, since it uses less digits than its factorization.

5261639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its digits is 9720, while the sum is 32.

The square root of 5261639 is about 2293.8262793856. The cubic root of 5261639 is about 173.9296738743.

The spelling of 5261639 in words is "five million, two hundred sixty-one thousand, six hundred thirty-nine".