2122290 has 24 divisors (see below), whose sum is σ = 5518188. Its totient is φ = 565920.

The previous prime is 2122277. The next prime is 2122303. The reversal of 2122290 is 922212.

It is an interprime number because it is at equal distance from previous prime (2122277) and next prime (2122303).

It can be written as a sum of positive squares in 2 ways, for example, as 2047761 + 74529 = 1431^2 + 273^2 .

It is a super-2 number, since 2×2122290² = 9008229688200, which contains 22 as substring.

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

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11701 + ... + 11880.

2^2122290 is an apocalyptic number.

2122290 is an abundant number, since it is smaller than the sum of its proper divisors (3395898).

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

2122290 is a wasteful number, since it uses less digits than its factorization.

2122290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23594 (or 23591 counting only the distinct ones).

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

The square root of 2122290 is about 1456.8081548371. The cubic root of 2122290 is about 128.5094039457.

It can be divided in two parts, 21222 and 90, that added together give a palindrome (21312).

The spelling of 2122290 in words is "two million, one hundred twenty-two thousand, two hundred ninety".