2123490 has 16 divisors (see below), whose sum is σ = 5096448. Its totient is φ = 566256.

The previous prime is 2123483. The next prime is 2123491. The reversal of 2123490 is 943212.

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

It is not an unprimeable number, because it can be changed into a prime (2123491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35362 + ... + 35421.

It is an arithmetic number, because the mean of its divisors is an integer number (318528).

2^2123490 is an apocalyptic number.

2123490 is an abundant number, since it is smaller than the sum of its proper divisors (2972958).

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

2123490 is a wasteful number, since it uses less digits than its factorization.

2123490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70793.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2123490 is about 1457.2199559435. The cubic root of 2123490 is about 128.5336202763.

The spelling of 2123490 in words is "two million, one hundred twenty-three thousand, four hundred ninety".