1316121457 has 8 divisors (see below), whose sum is σ = 1509571136. Its totient is φ = 1124029872.

The previous prime is 1316121439. The next prime is 1316121473. The reversal of 1316121457 is 7541216131.

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

It is not a de Polignac number, because 1316121457 - 2⁷ = 1316121329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316121427) 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 7 ways as a sum of consecutive naturals, for example, 337443 + ... + 341320.

It is an arithmetic number, because the mean of its divisors is an integer number (188696392).

Almost surely, 2^1316121457 is an apocalyptic number.

It is an amenable number.

1316121457 is a deficient number, since it is larger than the sum of its proper divisors (193449679).

1316121457 is an equidigital number, since it uses as much as digits as its factorization.

1316121457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679047.

The product of its digits is 5040, while the sum is 31.

The square root of 1316121457 is about 36278.3882911025. The cubic root of 1316121457 is about 1095.8858595971.

Adding to 1316121457 its reverse (7541216131), we get a palindrome (8857337588).

The spelling of 1316121457 in words is "one billion, three hundred sixteen million, one hundred twenty-one thousand, four hundred fifty-seven".