1313650261 has 12 divisors (see below), whose sum is σ = 1667044800. Its totient is φ = 1023623160.

The previous prime is 1313650259. The next prime is 1313650319. The reversal of 1313650261 is 1620563131.

It is not a de Polignac number, because 1313650261 - 2¹ = 1313650259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313650561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1218061 + ... + 1219138.

It is an arithmetic number, because the mean of its divisors is an integer number (138920400).

Almost surely, 2^1313650261 is an apocalyptic number.

1313650261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1313650261 is a deficient number, since it is larger than the sum of its proper divisors (353394539).

1313650261 is a wasteful number, since it uses less digits than its factorization.

1313650261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437224 (or 2437217 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1313650261 is about 36244.3134988097. The cubic root of 1313650261 is about 1095.1995385689.

The spelling of 1313650261 in words is "one billion, three hundred thirteen million, six hundred fifty thousand, two hundred sixty-one".