1022490 has 64 divisors (see below), whose sum is σ = 3121920. Its totient is φ = 233280.

The previous prime is 1022467. The next prime is 1022491. The reversal of 1022490 is 942201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022491) 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 31 ways as a sum of consecutive naturals, for example, 1620 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (48780).

2^1022490 is an apocalyptic number.

1022490 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 1022490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560960).

1022490 is an abundant number, since it is smaller than the sum of its proper divisors (2099430).

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

1022490 is a wasteful number, since it uses less digits than its factorization.

1022490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 558 counting only the distinct ones).

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

The square root of 1022490 is about 1011.1824761140. The cubic root of 1022490 is about 100.7441158486.

Adding to 1022490 its reverse (942201), we get a palindrome (1964691).

It can be divided in two parts, 10 and 22490, that added together give a square (22500 = 150²).

The spelling of 1022490 in words is "one million, twenty-two thousand, four hundred ninety".