2125945 has 4 divisors (see below), whose sum is σ = 2551140. Its totient is φ = 1700752.

The previous prime is 2125939. The next prime is 2125987. The reversal of 2125945 is 5495212.

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 535824 + 1590121 = 732^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125945 - 2¹¹ = 2123897 is a prime.

It is a plaindrome in base 11.

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, 212590 + ... + 212599.

It is an arithmetic number, because the mean of its divisors is an integer number (637785).

2^2125945 is an apocalyptic number.

It is an amenable number.

2125945 is a deficient number, since it is larger than the sum of its proper divisors (425195).

2125945 is an equidigital number, since it uses as much as digits as its factorization.

2125945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425194.

The product of its digits is 3600, while the sum is 28.

The square root of 2125945 is about 1458.0620700094. The cubic root of 2125945 is about 128.5831344427.

The spelling of 2125945 in words is "two million, one hundred twenty-five thousand, nine hundred forty-five".