260513278 has 4 divisors (see below), whose sum is σ = 390769920. Its totient is φ = 130256638.

The previous prime is 260513273. The next prime is 260513333. The reversal of 260513278 is 872315062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 872315062 = 2 ⋅436157531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260513273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65128318 + ... + 65128321.

It is an arithmetic number, because the mean of its divisors is an integer number (97692480).

Almost surely, 2^260513278 is an apocalyptic number.

260513278 is a deficient number, since it is larger than the sum of its proper divisors (130256642).

260513278 is a wasteful number, since it uses less digits than its factorization.

260513278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130256641.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 260513278 is about 16140.4237243017. The cubic root of 260513278 is about 638.6701536854.

The spelling of 260513278 in words is "two hundred sixty million, five hundred thirteen thousand, two hundred seventy-eight".