5252391 has 16 divisors (see below), whose sum is σ = 7948800. Its totient is φ = 3426264.

The previous prime is 5252389. The next prime is 5252411. The reversal of 5252391 is 1932525.

5252391 is a `hidden beast` number, since 52 + 523 + 91 = 666.

5252391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5252391 - 2¹ = 5252389 is a prime.

It is a super-2 number, since 2×5252391² = 55175222433762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5252311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (496800).

Almost surely, 2^5252391 is an apocalyptic number.

5252391 is a deficient number, since it is larger than the sum of its proper divisors (2696409).

5252391 is a wasteful number, since it uses less digits than its factorization.

5252391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195 (or 4189 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 5252391 is about 2291.8095470610. The cubic root of 5252391 is about 173.8277129374.

It can be divided in two parts, 525 and 2391, that added together give a square (2916 = 54²).

The spelling of 5252391 in words is "five million, two hundred fifty-two thousand, three hundred ninety-one".