5131261 has 4 divisors (see below), whose sum is σ = 5140732. Its totient is φ = 5121792.

The previous prime is 5131253. The next prime is 5131267. The reversal of 5131261 is 1621315.

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 3308761 + 1822500 = 1819^2 + 1350^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131261 - 2³ = 5131253 is a prime.

It is a Duffinian number.

5131261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131267) 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, 3870 + ... + 5023.

It is an arithmetic number, because the mean of its divisors is an integer number (1285183).

Almost surely, 2^5131261 is an apocalyptic number.

It is an amenable number.

5131261 is a deficient number, since it is larger than the sum of its proper divisors (9471).

5131261 is an equidigital number, since it uses as much as digits as its factorization.

5131261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470.

The product of its digits is 180, while the sum is 19.

The square root of 5131261 is about 2265.2286860271. The cubic root of 5131261 is about 172.4810425152.

Adding to 5131261 its reverse (1621315), we get a palindrome (6752576).

The spelling of 5131261 in words is "five million, one hundred thirty-one thousand, two hundred sixty-one".