1391242 has 4 divisors (see below), whose sum is σ = 2086866. Its totient is φ = 695620.

The previous prime is 1391239. The next prime is 1391261. The reversal of 1391242 is 2421931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1343281 + 47961 = 1159^2 + 219^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347809 + ... + 347812.

2^1391242 is an apocalyptic number.

1391242 is a deficient number, since it is larger than the sum of its proper divisors (695624).

1391242 is an equidigital number, since it uses as much as digits as its factorization.

1391242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695623.

The product of its digits is 432, while the sum is 22.

The square root of 1391242 is about 1179.5092199724. The cubic root of 1391242 is about 111.6351328003.

The spelling of 1391242 in words is "one million, three hundred ninety-one thousand, two hundred forty-two".