2138825 has 12 divisors (see below), whose sum is σ = 2856588. Its totient is φ = 1579200.

The previous prime is 2138813. The next prime is 2138831. The reversal of 2138825 is 5288312.

It can be written as a sum of positive squares in 6 ways, for example, as 446224 + 1692601 = 668^2 + 1301^2 .

It is not a de Polignac number, because 2138825 - 2⁸ = 2138569 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2966 + ... + 3615.

It is an arithmetic number, because the mean of its divisors is an integer number (238049).

2^2138825 is an apocalyptic number.

2138825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2138825 is a deficient number, since it is larger than the sum of its proper divisors (717763).

2138825 is a wasteful number, since it uses less digits than its factorization.

2138825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604 (or 6599 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 2138825 is about 1462.4722219584. The cubic root of 2138825 is about 128.8422846711.

The spelling of 2138825 in words is "two million, one hundred thirty-eight thousand, eight hundred twenty-five".