1327290261 has 12 divisors (see below), whose sum is σ = 1945230336. Its totient is φ = 804418120.

The previous prime is 1327290257. The next prime is 1327290269. The reversal of 1327290261 is 1620927231.

It is not a de Polignac number, because 1327290261 - 2² = 1327290257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327290269) 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, 1827861 + ... + 1828586.

It is an arithmetic number, because the mean of its divisors is an integer number (162102528).

Almost surely, 2^1327290261 is an apocalyptic number.

1327290261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1327290261 is a deficient number, since it is larger than the sum of its proper divisors (617940075).

1327290261 is a wasteful number, since it uses less digits than its factorization.

1327290261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656472 (or 3656461 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1327290261 is about 36431.9950181156. The cubic root of 1327290261 is about 1098.9770823914.

The spelling of 1327290261 in words is "one billion, three hundred twenty-seven million, two hundred ninety thousand, two hundred sixty-one".