1321942347 has 24 divisors (see below), whose sum is σ = 2192698560. Its totient is φ = 759008880.

The previous prime is 1321942343. The next prime is 1321942357. The reversal of 1321942347 is 7432491231.

It is a happy number.

1321942347 is a `hidden beast` number, since 13 + 219 + 423 + 4 + 7 = 666.

It is not a de Polignac number, because 1321942347 - 2² = 1321942343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321942343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349513 + ... + 353274.

It is an arithmetic number, because the mean of its divisors is an integer number (91362440).

Almost surely, 2^1321942347 is an apocalyptic number.

1321942347 is a deficient number, since it is larger than the sum of its proper divisors (870756213).

1321942347 is a wasteful number, since it uses less digits than its factorization.

1321942347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702823 (or 702820 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1321942347 is about 36358.5250938483. The cubic root of 1321942347 is about 1097.4990971743.

The spelling of 1321942347 in words is "one billion, three hundred twenty-one million, nine hundred forty-two thousand, three hundred forty-seven".