2126690 has 8 divisors (see below), whose sum is σ = 3828060. Its totient is φ = 850672.

The previous prime is 2126687. The next prime is 2126749. The reversal of 2126690 is 966212.

It can be written as a sum of positive squares in 2 ways, for example, as 2024929 + 101761 = 1423^2 + 319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2126690² = 9045620712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106325 + ... + 106344.

2^2126690 is an apocalyptic number.

2126690 is a deficient number, since it is larger than the sum of its proper divisors (1701370).

2126690 is a wasteful number, since it uses less digits than its factorization.

2126690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212676.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2126690 is about 1458.3175237238. The cubic root of 2126690 is about 128.5981525872.

The spelling of 2126690 in words is "two million, one hundred twenty-six thousand, six hundred ninety".