1391442 has 16 divisors (see below), whose sum is σ = 2997120. Its totient is φ = 428112.

The previous prime is 1391441. The next prime is 1391447. The reversal of 1391442 is 2441931.

It is a super-2 number, since 2×1391442² = 3872221678728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1391441) 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, 8842 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (187320).

2^1391442 is an apocalyptic number.

1391442 is an abundant number, since it is smaller than the sum of its proper divisors (1605678).

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

1391442 is a wasteful number, since it uses less digits than its factorization.

1391442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17857.

The product of its digits is 864, while the sum is 24.

The square root of 1391442 is about 1179.5939979501. The cubic root of 1391442 is about 111.6404819672.

The spelling of 1391442 in words is "one million, three hundred ninety-one thousand, four hundred forty-two".