1239942 has 16 divisors (see below), whose sum is σ = 2705472. Its totient is φ = 375720.

The previous prime is 1239923. The next prime is 1239943. The reversal of 1239942 is 2499321.

It is a d-powerful number, because it can be written as 1 + 2⁹ + 3 + 9³ + 9⁵ + 4¹⁰ + 2¹⁷ .

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9328 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (169092).

2^1239942 is an apocalyptic number.

1239942 is an abundant number, since it is smaller than the sum of its proper divisors (1465530).

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

1239942 is a wasteful number, since it uses less digits than its factorization.

1239942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18803.

The product of its digits is 3888, while the sum is 30.

The square root of 1239942 is about 1113.5268294927. The cubic root of 1239942 is about 107.4320320311.

The spelling of 1239942 in words is "one million, two hundred thirty-nine thousand, nine hundred forty-two".