2126989 has 4 divisors (see below), whose sum is σ = 2252124. Its totient is φ = 2001856.

The previous prime is 2126963. The next prime is 2127007. The reversal of 2126989 is 9896212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1612900 + 514089 = 1270^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126989 - 2¹⁵ = 2094221 is a prime.

It is a super-2 number, since 2×2126989² = 9048164412242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62542 + ... + 62575.

It is an arithmetic number, because the mean of its divisors is an integer number (563031).

2^2126989 is an apocalyptic number.

It is an amenable number.

2126989 is a deficient number, since it is larger than the sum of its proper divisors (125135).

2126989 is a wasteful number, since it uses less digits than its factorization.

2126989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125134.

The product of its digits is 15552, while the sum is 37.

The square root of 2126989 is about 1458.4200355179. The cubic root of 2126989 is about 128.6041790173.

The spelling of 2126989 in words is "two million, one hundred twenty-six thousand, nine hundred eighty-nine".