261325659 has 16 divisors (see below), whose sum is σ = 398444288. Its totient is φ = 149241312.

The previous prime is 261325657. The next prime is 261325679. The reversal of 261325659 is 956523162.

It is not a de Polignac number, because 261325659 - 2¹ = 261325657 is a prime.

It is a super-2 number, since 2×261325659² = 136582200103568562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261325657) 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, 54549 + ... + 59145.

It is an arithmetic number, because the mean of its divisors is an integer number (24902768).

Almost surely, 2^261325659 is an apocalyptic number.

261325659 is a deficient number, since it is larger than the sum of its proper divisors (137118629).

261325659 is a wasteful number, since it uses less digits than its factorization.

261325659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its digits is 97200, while the sum is 39.

The square root of 261325659 is about 16165.5701724375. The cubic root of 261325659 is about 639.3333381961. Note that the first 5 decimals are identical.

The spelling of 261325659 in words is "two hundred sixty-one million, three hundred twenty-five thousand, six hundred fifty-nine".