1313250261 has 16 divisors (see below), whose sum is σ = 1787512320. Its totient is φ = 857358320.

The previous prime is 1313250223. The next prime is 1313250283. The reversal of 1313250261 is 1620523131.

It is a cyclic number.

It is not a de Polignac number, because 1313250261 - 2¹⁰ = 1313249237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313250061) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32446 + ... + 60656.

It is an arithmetic number, because the mean of its divisors is an integer number (111719520).

Almost surely, 2^1313250261 is an apocalyptic number.

It is an amenable number.

1313250261 is a deficient number, since it is larger than the sum of its proper divisors (474262059).

1313250261 is a wasteful number, since it uses less digits than its factorization.

1313250261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28536.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1313250261 is about 36238.7949716875. The cubic root of 1313250261 is about 1095.0883663388.

Adding to 1313250261 its reverse (1620523131), we get a palindrome (2933773392).

The spelling of 1313250261 in words is "one billion, three hundred thirteen million, two hundred fifty thousand, two hundred sixty-one".