2101625 has 32 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 1478400.

The previous prime is 2101621. The next prime is 2101651. The reversal of 2101625 is 5261012.

It is not a de Polignac number, because 2101625 - 2² = 2101621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101621) 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, 48854 + ... + 48896.

It is an arithmetic number, because the mean of its divisors is an integer number (92664).

2^2101625 is an apocalyptic number.

2101625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101625 is a deficient number, since it is larger than the sum of its proper divisors (863623).

2101625 is a wasteful number, since it uses less digits than its factorization.

2101625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2101625 is about 1449.6982444633. The cubic root of 2101625 is about 128.0909387944.

Adding to 2101625 its reverse (5261012), we get a palindrome (7362637).

The spelling of 2101625 in words is "two million, one hundred one thousand, six hundred twenty-five".