1120639 has 12 divisors (see below), whose sum is σ = 1281000. Its totient is φ = 977184.

The previous prime is 1120633. The next prime is 1120649. The reversal of 1120639 is 9360211.

It is not a de Polignac number, because 1120639 - 2⁵ = 1120607 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 (1120633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3037 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (106750).

2^1120639 is an apocalyptic number.

1120639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1120639 is a deficient number, since it is larger than the sum of its proper divisors (160361).

1120639 is a wasteful number, since it uses less digits than its factorization.

1120639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 381 counting only the distinct ones).

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

The square root of 1120639 is about 1058.6023804999. The cubic root of 1120639 is about 103.8696283044.

The spelling of 1120639 in words is "one million, one hundred twenty thousand, six hundred thirty-nine".