2125640 has 32 divisors (see below), whose sum is σ = 5218560. Its totient is φ = 772800.

The previous prime is 2125621. The next prime is 2125649. The reversal of 2125640 is 465212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2125649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (163080).

2^2125640 is an apocalyptic number.

2125640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2125640 is an abundant number, since it is smaller than the sum of its proper divisors (3092920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2125640 is a wasteful number, since it uses less digits than its factorization.

2125640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853 (or 4849 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2125640 is about 1457.9574753744. The cubic root of 2125640 is about 128.5769850626.

The spelling of 2125640 in words is "two million, one hundred twenty-five thousand, six hundred forty".