1246139 has 4 divisors (see below), whose sum is σ = 1267320. Its totient is φ = 1224960.

The previous prime is 1246103. The next prime is 1246181. The reversal of 1246139 is 9316421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316421 = 373 ⋅24977.

It is a cyclic number.

It is not a de Polignac number, because 1246139 - 2⁸ = 1245883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1246199) 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 3 ways as a sum of consecutive naturals, for example, 10502 + ... + 10619.

It is an arithmetic number, because the mean of its divisors is an integer number (316830).

2^1246139 is an apocalyptic number.

1246139 is a deficient number, since it is larger than the sum of its proper divisors (21181).

1246139 is an equidigital number, since it uses as much as digits as its factorization.

1246139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21180.

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

The square root of 1246139 is about 1116.3059616431. The cubic root of 1246139 is about 107.6107098141.

The spelling of 1246139 in words is "one million, two hundred forty-six thousand, one hundred thirty-nine".