1216039 has 8 divisors (see below), whose sum is σ = 1335168. Its totient is φ = 1098360.

The previous prime is 1216021. The next prime is 1216043. The reversal of 1216039 is 9306121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216039 - 2¹⁵ = 1183271 is a prime.

It is a Duffinian number.

1216039 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216009) 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, 2254 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (166896).

2^1216039 is an apocalyptic number.

1216039 is a deficient number, since it is larger than the sum of its proper divisors (119129).

1216039 is a wasteful number, since it uses less digits than its factorization.

1216039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1216039 is about 1102.7415835090. The cubic root of 1216039 is about 106.7372070295.

The spelling of 1216039 in words is "one million, two hundred sixteen thousand, thirty-nine".