1246391 has 4 divisors (see below), whose sum is σ = 1289400. Its totient is φ = 1203384.

The previous prime is 1246387. The next prime is 1246397. The reversal of 1246391 is 1936421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1936421 = 1297 ⋅1493.

It is not a de Polignac number, because 1246391 - 2² = 1246387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1246391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21461 + ... + 21518.

It is an arithmetic number, because the mean of its divisors is an integer number (322350).

2^1246391 is an apocalyptic number.

1246391 is a deficient number, since it is larger than the sum of its proper divisors (43009).

1246391 is an equidigital number, since it uses as much as digits as its factorization.

1246391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43008.

The product of its digits is 1296, while the sum is 26.

The square root of 1246391 is about 1116.4188282182. The cubic root of 1246391 is about 107.6179631706.

The spelling of 1246391 in words is "one million, two hundred forty-six thousand, three hundred ninety-one".