1321214378 has 16 divisors (see below), whose sum is σ = 2162968704. Its totient is φ = 600279360.

The previous prime is 1321214359. The next prime is 1321214383. The reversal of 1321214378 is 8734121231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40751 + ... + 65597.

It is an arithmetic number, because the mean of its divisors is an integer number (135185544).

Almost surely, 2^1321214378 is an apocalyptic number.

1321214378 is a deficient number, since it is larger than the sum of its proper divisors (841754326).

1321214378 is a wasteful number, since it uses less digits than its factorization.

1321214378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27277.

The product of its digits is 8064, while the sum is 32.

The square root of 1321214378 is about 36348.5127343609. The cubic root of 1321214378 is about 1097.2976027542.

The spelling of 1321214378 in words is "one billion, three hundred twenty-one million, two hundred fourteen thousand, three hundred seventy-eight".