1321375670 has 32 divisors (see below), whose sum is σ = 2423034432. Its totient is φ = 518740992.

The previous prime is 1321375669. The next prime is 1321375697. The reversal of 1321375670 is 765731231.

It is a super-2 number, since 2×1321375670² = 3492067322535897800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321375670.

It is a congruent number.

It is an unprimeable number.

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, 110714 + ... + 122066.

It is an arithmetic number, because the mean of its divisors is an integer number (75719826).

Almost surely, 2^1321375670 is an apocalyptic number.

1321375670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321375670 is a deficient number, since it is larger than the sum of its proper divisors (1101658762).

1321375670 is a wasteful number, since it uses less digits than its factorization.

1321375670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11576.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 1321375670 is about 36350.7313544033. The cubic root of 1321375670 is about 1097.3422531219.

The spelling of 1321375670 in words is "one billion, three hundred twenty-one million, three hundred seventy-five thousand, six hundred seventy".