1316506405 has 16 divisors (see below), whose sum is σ = 1589725440. Its totient is φ = 1046613568.

The previous prime is 1316506393. The next prime is 1316506439. The reversal of 1316506405 is 5046056131.

It is a cyclic number.

It is not a de Polignac number, because 1316506405 - 2⁷ = 1316506277 is a prime.

It is a super-2 number, since 2×1316506405² = 3466378228812048050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815379 + ... + 816991.

It is an arithmetic number, because the mean of its divisors is an integer number (99357840).

Almost surely, 2^1316506405 is an apocalyptic number.

It is an amenable number.

1316506405 is a deficient number, since it is larger than the sum of its proper divisors (273219035).

1316506405 is a wasteful number, since it uses less digits than its factorization.

1316506405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1316506405 is about 36283.6933759506. The cubic root of 1316506405 is about 1095.9926931888.

The spelling of 1316506405 in words is "one billion, three hundred sixteen million, five hundred six thousand, four hundred five".