2123290 has 16 divisors (see below), whose sum is σ = 4116168. Its totient is φ = 783936.

The previous prime is 2123281. The next prime is 2123309. The reversal of 2123290 is 923212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 793881 + 1329409 = 891^2 + 1153^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8037 + ... + 8296.

2^2123290 is an apocalyptic number.

2123290 is a deficient number, since it is larger than the sum of its proper divisors (1992878).

2123290 is a wasteful number, since it uses less digits than its factorization.

2123290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16353.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2123290 is about 1457.1513305076. The cubic root of 2123290 is about 128.5295848549.

The spelling of 2123290 in words is "two million, one hundred twenty-three thousand, two hundred ninety".