260415385 has 4 divisors (see below), whose sum is σ = 312498468. Its totient is φ = 208332304.

The previous prime is 260415373. The next prime is 260415409. The reversal of 260415385 is 583514062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583514062 = 2 ⋅291757031.

It can be written as a sum of positive squares in 2 ways, for example, as 62394201 + 198021184 = 7899^2 + 14072^2 .

It is a cyclic number.

It is not a de Polignac number, because 260415385 - 2²¹ = 258318233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260415385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26041534 + ... + 26041543.

It is an arithmetic number, because the mean of its divisors is an integer number (78124617).

Almost surely, 2^260415385 is an apocalyptic number.

It is an amenable number.

260415385 is a deficient number, since it is larger than the sum of its proper divisors (52083083).

260415385 is an equidigital number, since it uses as much as digits as its factorization.

260415385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52083082.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 260415385 is about 16137.3908981595. The cubic root of 260415385 is about 638.5901460294.

The spelling of 260415385 in words is "two hundred sixty million, four hundred fifteen thousand, three hundred eighty-five".