1422090 has 64 divisors (see below), whose sum is σ = 3974400. Its totient is φ = 361152.

The previous prime is 1422089. The next prime is 1422097. The reversal of 1422090 is 902241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1422097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6096 + ... + 6324.

It is an arithmetic number, because the mean of its divisors is an integer number (62100).

2^1422090 is an apocalyptic number.

1422090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987200).

1422090 is an abundant number, since it is smaller than the sum of its proper divisors (2552310).

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

1422090 is a wasteful number, since it uses less digits than its factorization.

1422090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1422090 is about 1192.5141508594. The cubic root of 1422090 is about 112.4542035820.

The spelling of 1422090 in words is "one million, four hundred twenty-two thousand, ninety".