261251713 has 8 divisors (see below), whose sum is σ = 270851616. Its totient is φ = 251805600.

The previous prime is 261251689. The next prime is 261251717. The reversal of 261251713 is 317152162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261251713 - 2⁹ = 261251201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261251717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34983 + ... + 41788.

It is an arithmetic number, because the mean of its divisors is an integer number (33856452).

Almost surely, 2^261251713 is an apocalyptic number.

It is an amenable number.

261251713 is a deficient number, since it is larger than the sum of its proper divisors (9599903).

261251713 is an equidigital number, since it uses as much as digits as its factorization.

261251713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76895.

The product of its digits is 2520, while the sum is 28.

The square root of 261251713 is about 16163.2828658042. The cubic root of 261251713 is about 639.2730295337.

The spelling of 261251713 in words is "two hundred sixty-one million, two hundred fifty-one thousand, seven hundred thirteen".