1220439 has 16 divisors (see below), whose sum is σ = 1833984. Its totient is φ = 715200.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220439 is 9340221.

It is not a de Polignac number, because 1220439 - 2¹ = 1220437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (114624).

2^1220439 is an apocalyptic number.

1220439 is a deficient number, since it is larger than the sum of its proper divisors (613545).

1220439 is a wasteful number, since it uses less digits than its factorization.

1220439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1220439 is about 1104.7348098073. The cubic root of 1220439 is about 106.8657879957.

The spelling of 1220439 in words is "one million, two hundred twenty thousand, four hundred thirty-nine".