1220492 has 36 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 481824.

The previous prime is 1220491. The next prime is 1220497. The reversal of 1220492 is 2940221.

It is not an unprimeable number, because it can be changed into a prime (1220491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2309 + ... + 2787.

It is an arithmetic number, because the mean of its divisors is an integer number (74480).

2^1220492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340640).

1220492 is an abundant number, since it is smaller than the sum of its proper divisors (1460788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220492 is a wasteful number, since it uses less digits than its factorization.

1220492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1220492 is about 1104.7587972042. The cubic root of 1220492 is about 106.8673349267.

The spelling of 1220492 in words is "one million, two hundred twenty thousand, four hundred ninety-two".