1331262361 has 16 divisors (see below), whose sum is σ = 1565923968. Its totient is φ = 1115769600.

The previous prime is 1331262347. The next prime is 1331262391. The reversal of 1331262361 is 1632621331.

It is not a de Polignac number, because 1331262361 - 2¹⁵ = 1331229593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331262301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120700 + ... + 131266.

It is an arithmetic number, because the mean of its divisors is an integer number (97870248).

Almost surely, 2^1331262361 is an apocalyptic number.

1331262361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331262361 is a deficient number, since it is larger than the sum of its proper divisors (234661607).

1331262361 is a wasteful number, since it uses less digits than its factorization.

1331262361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11472.

The product of its digits is 3888, while the sum is 28.

The square root of 1331262361 is about 36486.4681902757. The cubic root of 1331262361 is about 1100.0722710092.

Adding to 1331262361 its reverse (1632621331), we get a palindrome (2963883692).

The spelling of 1331262361 in words is "one billion, three hundred thirty-one million, two hundred sixty-two thousand, three hundred sixty-one".