5257801261 has 4 divisors (see below), whose sum is σ = 5258058300. Its totient is φ = 5257544224.

The previous prime is 5257801223. The next prime is 5257801267. The reversal of 5257801261 is 1621087525.

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 2340721161 + 2917080100 = 48381^2 + 54010^2 .

It is a cyclic number.

It is not a de Polignac number, because 5257801261 - 2¹¹ = 5257799213 is a prime.

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 5257801261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257801267) 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, 94906 + ... + 139723.

It is an arithmetic number, because the mean of its divisors is an integer number (1314514575).

Almost surely, 2^5257801261 is an apocalyptic number.

It is an amenable number.

5257801261 is a deficient number, since it is larger than the sum of its proper divisors (257039).

5257801261 is a wasteful number, since it uses less digits than its factorization.

5257801261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257038.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 5257801261 is about 72510.6975624976. The cubic root of 5257801261 is about 1738.8737659493.

Adding to 5257801261 its reverse (1621087525), we get a palindrome (6878888786).

The spelling of 5257801261 in words is "five billion, two hundred fifty-seven million, eight hundred one thousand, two hundred sixty-one".