259540465 has 8 divisors (see below), whose sum is σ = 314948520. Its totient is φ = 205299072.

The previous prime is 259540451. The next prime is 259540471. The reversal of 259540465 is 564045952.

It can be written as a sum of positive squares in 4 ways, for example, as 8856576 + 250683889 = 2976^2 + 15833^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259540465 is a prime.

It is a super-2 number, since 2×259540465² = 134722505944832450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291174 + ... + 292063.

It is an arithmetic number, because the mean of its divisors is an integer number (39368565).

Almost surely, 2^259540465 is an apocalyptic number.

It is an amenable number.

259540465 is a deficient number, since it is larger than the sum of its proper divisors (55408055).

259540465 is an equidigital number, since it uses as much as digits as its factorization.

259540465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583331.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 259540465 is about 16110.2596192613. The cubic root of 259540465 is about 637.8741845306.

The spelling of 259540465 in words is "two hundred fifty-nine million, five hundred forty thousand, four hundred sixty-five".