2100425 has 6 divisors (see below), whose sum is σ = 2604558. Its totient is φ = 1680320.

The previous prime is 2100409. The next prime is 2100451. The reversal of 2100425 is 5240012.

It can be written as a sum of positive squares in 3 ways, for example, as 3721 + 2096704 = 61^2 + 1448^2 .

It is not a de Polignac number, because 2100425 - 2⁴ = 2100409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41984 + ... + 42033.

It is an arithmetic number, because the mean of its divisors is an integer number (434093).

2^2100425 is an apocalyptic number.

2100425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100425 is a deficient number, since it is larger than the sum of its proper divisors (504133).

2100425 is an equidigital number, since it uses as much as digits as its factorization.

2100425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84027 (or 84022 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2100425 is about 1449.2843061318. The cubic root of 2100425 is about 128.0665547437.

Adding to 2100425 its reverse (5240012), we get a palindrome (7340437).

The spelling of 2100425 in words is "two million, one hundred thousand, four hundred twenty-five".