2123985 has 32 divisors (see below), whose sum is σ = 3611520. Its totient is φ = 1064448.

The previous prime is 2123983. The next prime is 2123999. The reversal of 2123985 is 5893212.

It is a happy number.

It is not a de Polignac number, because 2123985 - 2¹ = 2123983 is a prime.

It is a super-2 number, since 2×2123985² = 9022624560450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23821 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2^2123985 is an apocalyptic number.

It is an amenable number.

2123985 is a deficient number, since it is larger than the sum of its proper divisors (1487535).

2123985 is a wasteful number, since it uses less digits than its factorization.

2123985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177.

The product of its digits is 4320, while the sum is 30.

The square root of 2123985 is about 1457.3897900013. The cubic root of 2123985 is about 128.5436068548.

The spelling of 2123985 in words is "two million, one hundred twenty-three thousand, nine hundred eighty-five".