1219139 has 4 divisors (see below), whose sum is σ = 1224480. Its totient is φ = 1213800.

The previous prime is 1219129. The next prime is 1219147. The reversal of 1219139 is 9319121.

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

It is a cyclic number.

It is not a de Polignac number, because 1219139 - 2⁴ = 1219123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219109) 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, 2312 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (306120).

2^1219139 is an apocalyptic number.

1219139 is a deficient number, since it is larger than the sum of its proper divisors (5341).

1219139 is an equidigital number, since it uses as much as digits as its factorization.

1219139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340.

The product of its digits is 486, while the sum is 26.

The square root of 1219139 is about 1104.1462765413. The cubic root of 1219139 is about 106.8278303753.

The spelling of 1219139 in words is "one million, two hundred nineteen thousand, one hundred thirty-nine".