260399995 has 4 divisors (see below), whose sum is σ = 312480000. Its totient is φ = 208319992.

The previous prime is 260399983. The next prime is 260400013. The reversal of 260399995 is 599993062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 599993062 = 2 ⋅299996531.

It is a cyclic number.

It is not a de Polignac number, because 260399995 - 2⁵ = 260399963 is a prime.

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, 26039995 + ... + 26040004.

It is an arithmetic number, because the mean of its divisors is an integer number (78120000).

Almost surely, 2^260399995 is an apocalyptic number.

260399995 is a deficient number, since it is larger than the sum of its proper divisors (52080005).

260399995 is an equidigital number, since it uses as much as digits as its factorization.

260399995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52080004.

The product of its (nonzero) digits is 1180980, while the sum is 52.

The square root of 260399995 is about 16136.9140482312. The cubic root of 260399995 is about 638.5775660047.

The spelling of 260399995 in words is "two hundred sixty million, three hundred ninety-nine thousand, nine hundred ninety-five".