260391465 has 24 divisors (see below), whose sum is σ = 477896328. Its totient is φ = 130705920.

The previous prime is 260391463. The next prime is 260391503. The reversal of 260391465 is 564193062.

It is a happy number.

260391465 is a `hidden beast` number, since 2 + 603 + 9 + 1 + 46 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 48776256 + 211615209 = 6984^2 + 14547^2 .

It is not a de Polignac number, because 260391465 - 2¹ = 260391463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (260391463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169426 + ... + 170955.

It is an arithmetic number, because the mean of its divisors is an integer number (19912347).

Almost surely, 2^260391465 is an apocalyptic number.

It is an amenable number.

260391465 is a deficient number, since it is larger than the sum of its proper divisors (217504863).

260391465 is a wasteful number, since it uses less digits than its factorization.

260391465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340409 (or 340406 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 260391465 is about 16136.6497452228. The cubic root of 260391465 is about 638.5705932369.

The spelling of 260391465 in words is "two hundred sixty million, three hundred ninety-one thousand, four hundred sixty-five".