259787261 has 4 divisors (see below), whose sum is σ = 262917312. Its totient is φ = 256657212.

The previous prime is 259787237. The next prime is 259787267. The reversal of 259787261 is 162787952.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 259787261 - 2⁶ = 259787197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259787267) 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, 1564901 + ... + 1565066.

It is an arithmetic number, because the mean of its divisors is an integer number (65729328).

Almost surely, 2^259787261 is an apocalyptic number.

It is an amenable number.

259787261 is a deficient number, since it is larger than the sum of its proper divisors (3130051).

259787261 is an equidigital number, since it uses as much as digits as its factorization.

259787261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130050.

The product of its digits is 423360, while the sum is 47.

The square root of 259787261 is about 16117.9173902834. The cubic root of 259787261 is about 638.0763044909.

The spelling of 259787261 in words is "two hundred fifty-nine million, seven hundred eighty-seven thousand, two hundred sixty-one".