259270661 has 4 divisors (see below), whose sum is σ = 279214572. Its totient is φ = 239326752.

The previous prime is 259270633. The next prime is 259270663. The reversal of 259270661 is 166072952.

It is a happy number.

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 159390625 + 99880036 = 12625^2 + 9994^2 .

It is a cyclic number.

It is not a de Polignac number, because 259270661 - 2⁶ = 259270597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259270663) 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, 9971936 + ... + 9971961.

It is an arithmetic number, because the mean of its divisors is an integer number (69803643).

Almost surely, 2^259270661 is an apocalyptic number.

It is an amenable number.

259270661 is a deficient number, since it is larger than the sum of its proper divisors (19943911).

259270661 is a wasteful number, since it uses less digits than its factorization.

259270661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19943910.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 259270661 is about 16101.8837717827. The cubic root of 259270661 is about 637.6530749161.

The spelling of 259270661 in words is "two hundred fifty-nine million, two hundred seventy thousand, six hundred sixty-one".