1320650261 has 8 divisors (see below), whose sum is σ = 1509868224. Its totient is φ = 1131570720.

The previous prime is 1320650257. The next prime is 1320650293. The reversal of 1320650261 is 1620560231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320650261 - 2² = 1320650257 is a prime.

It is a super-2 number, since 2×1320650261² = 3488234223758736242, which contains 22 as substring.

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 1320650261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320650231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13280 + ... + 53081.

It is an arithmetic number, because the mean of its divisors is an integer number (188733528).

Almost surely, 2^1320650261 is an apocalyptic number.

It is an amenable number.

1320650261 is a deficient number, since it is larger than the sum of its proper divisors (189217963).

1320650261 is an equidigital number, since it uses as much as digits as its factorization.

1320650261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69211.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1320650261 is about 36340.7520698183. The cubic root of 1320650261 is about 1097.1414099966.

The spelling of 1320650261 in words is "one billion, three hundred twenty million, six hundred fifty thousand, two hundred sixty-one".