1321613774 has 24 divisors (see below), whose sum is σ = 2181399528. Its totient is φ = 596971440.

The previous prime is 1321613719. The next prime is 1321613849. The reversal of 1321613774 is 4773161231.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 45929 + ... + 68939.

It is an arithmetic number, because the mean of its divisors is an integer number (90891647).

Almost surely, 2^1321613774 is an apocalyptic number.

1321613774 is a deficient number, since it is larger than the sum of its proper divisors (859785754).

1321613774 is a wasteful number, since it uses less digits than its factorization.

1321613774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23120 (or 23073 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 1321613774 is about 36354.0062991687. The cubic root of 1321613774 is about 1097.4081606690.

The spelling of 1321613774 in words is "one billion, three hundred twenty-one million, six hundred thirteen thousand, seven hundred seventy-four".