1392299621 has 8 divisors (see below), whose sum is σ = 1437689088. Its totient is φ = 1346940000.

The previous prime is 1392299617. The next prime is 1392299639. The reversal of 1392299621 is 1269922931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1392299621 - 2² = 1392299617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392299521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124886 + ... + 135576.

It is an arithmetic number, because the mean of its divisors is an integer number (179711136).

Almost surely, 2^1392299621 is an apocalyptic number.

It is an amenable number.

1392299621 is a deficient number, since it is larger than the sum of its proper divisors (45389467).

1392299621 is a wasteful number, since it uses less digits than its factorization.

1392299621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14923.

The product of its digits is 104976, while the sum is 44.

The square root of 1392299621 is about 37313.5313391804. The cubic root of 1392299621 is about 1116.6341394649.

The spelling of 1392299621 in words is "one billion, three hundred ninety-two million, two hundred ninety-nine thousand, six hundred twenty-one".