1239491 has 8 divisors (see below), whose sum is σ = 1360368. Its totient is φ = 1120000.

The previous prime is 1239481. The next prime is 1239499. The reversal of 1239491 is 1949321.

It is a happy number.

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

It is a 8-Lehmer number, since φ(1239491) divides (1239491-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1239491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239499) 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, 2891 + ... + 3291.

It is an arithmetic number, because the mean of its divisors is an integer number (170046).

2^1239491 is an apocalyptic number.

1239491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1239491 is a deficient number, since it is larger than the sum of its proper divisors (120877).

1239491 is a wasteful number, since it uses less digits than its factorization.

1239491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its digits is 1944, while the sum is 29.

The square root of 1239491 is about 1113.3243013606. The cubic root of 1239491 is about 107.4190051524.

The spelling of 1239491 in words is "one million, two hundred thirty-nine thousand, four hundred ninety-one".