2125851 has 24 divisors (see below), whose sum is σ = 3513600. Its totient is φ = 1119456.

The previous prime is 2125847. The next prime is 2125873. The reversal of 2125851 is 1585212.

It is not a de Polignac number, because 2125851 - 2² = 2125847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3250 + ... + 3848.

It is an arithmetic number, because the mean of its divisors is an integer number (146400).

2^2125851 is an apocalyptic number.

2125851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2125851 is a deficient number, since it is larger than the sum of its proper divisors (1387749).

2125851 is a wasteful number, since it uses less digits than its factorization.

2125851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 622 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 2125851 is about 1458.0298350857. The cubic root of 2125851 is about 128.5812392866.

The spelling of 2125851 in words is "two million, one hundred twenty-five thousand, eight hundred fifty-one".