1316251321 has 16 divisors (see below), whose sum is σ = 1664160768. Its totient is φ = 1011200400.

The previous prime is 1316251301. The next prime is 1316251361. The reversal of 1316251321 is 1231526131.

It is a happy number.

It is not a de Polignac number, because 1316251321 - 2⁷ = 1316251193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316251301) 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, 114915 + ... + 125848.

It is an arithmetic number, because the mean of its divisors is an integer number (104010048).

Almost surely, 2^1316251321 is an apocalyptic number.

1316251321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1316251321 is a deficient number, since it is larger than the sum of its proper divisors (347909447).

1316251321 is a wasteful number, since it uses less digits than its factorization.

1316251321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240852.

The product of its digits is 1080, while the sum is 25.

The square root of 1316251321 is about 36280.1780728816. The cubic root of 1316251321 is about 1095.9219027348.

Adding to 1316251321 its reverse (1231526131), we get a palindrome (2547777452).

The spelling of 1316251321 in words is "one billion, three hundred sixteen million, two hundred fifty-one thousand, three hundred twenty-one".