5261381 has 4 divisors (see below), whose sum is σ = 5570892. Its totient is φ = 4951872.

The previous prime is 5261359. The next prime is 5261387. The reversal of 5261381 is 1831625.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1985281 + 3276100 = 1409^2 + 1810^2 .

It is a cyclic number.

It is not a de Polignac number, because 5261381 - 2⁶ = 5261317 is a prime.

It is a super-2 number, since 2×5261381² = 55364260054322, which contains 22 as substring.

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 5261381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5261387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154730 + ... + 154763.

It is an arithmetic number, because the mean of its divisors is an integer number (1392723).

Almost surely, 2^5261381 is an apocalyptic number.

It is an amenable number.

5261381 is a deficient number, since it is larger than the sum of its proper divisors (309511).

5261381 is a wasteful number, since it uses less digits than its factorization.

5261381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309510.

The product of its digits is 1440, while the sum is 26.

The square root of 5261381 is about 2293.7700407844. The cubic root of 5261381 is about 173.9268309966.

The spelling of 5261381 in words is "five million, two hundred sixty-one thousand, three hundred eighty-one".