1243491 has 8 divisors (see below), whose sum is σ = 1715280. Its totient is φ = 800352.

The previous prime is 1243483. The next prime is 1243511. The reversal of 1243491 is 1943421.

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

It is not a de Polignac number, because 1243491 - 2³ = 1243483 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1243421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7060 + ... + 7233.

It is an arithmetic number, because the mean of its divisors is an integer number (214410).

2^1243491 is an apocalyptic number.

1243491 is a deficient number, since it is larger than the sum of its proper divisors (471789).

1243491 is a wasteful number, since it uses less digits than its factorization.

1243491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14325.

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

The square root of 1243491 is about 1115.1192761315. The cubic root of 1243491 is about 107.5344328133.

The spelling of 1243491 in words is "one million, two hundred forty-three thousand, four hundred ninety-one".