1213039 has 4 divisors (see below), whose sum is σ = 1219000. Its totient is φ = 1207080.

The previous prime is 1213033. The next prime is 1213049. The reversal of 1213039 is 9303121.

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 1213039 - 2⁵ = 1213007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213033) 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, 2664 + ... + 3085.

It is an arithmetic number, because the mean of its divisors is an integer number (304750).

2^1213039 is an apocalyptic number.

1213039 is a deficient number, since it is larger than the sum of its proper divisors (5961).

1213039 is an equidigital number, since it uses as much as digits as its factorization.

1213039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1213039 is about 1101.3804973759. The cubic root of 1213039 is about 106.6493602565.

It can be divided in two parts, 121 and 3039, that added together give a triangular number (3160 = T₇₉).

The spelling of 1213039 in words is "one million, two hundred thirteen thousand, thirty-nine".