1399842 has 20 divisors (see below), whose sum is σ = 3137046. Its totient is φ = 466560.

The previous prime is 1399837. The next prime is 1399843. The reversal of 1399842 is 2489931.

It can be written as a sum of positive squares in only one way, i.e., 1390041 + 9801 = 1179^2 + 99^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1399797 and 1399806.

It is not an unprimeable number, because it can be changed into a prime (1399843) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4159 + ... + 4482.

2^1399842 is an apocalyptic number.

1399842 is an abundant number, since it is smaller than the sum of its proper divisors (1737204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399842 is an equidigital number, since it uses as much as digits as its factorization.

1399842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8655 (or 8646 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1399842 is about 1183.1491875499. The cubic root of 1399842 is about 111.8646856486.

The spelling of 1399842 in words is "one million, three hundred ninety-nine thousand, eight hundred forty-two".