2129425 has 12 divisors (see below), whose sum is σ = 2780080. Its totient is φ = 1613520.

The previous prime is 2129423. The next prime is 2129431. The reversal of 2129425 is 5249212.

It is not a de Polignac number, because 2129425 - 2¹ = 2129423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 2129425.

It is not an unprimeable number, because it can be changed into a prime (2129423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1767 + ... + 2716.

2^2129425 is an apocalyptic number.

2129425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2129425 is a deficient number, since it is larger than the sum of its proper divisors (650655).

2129425 is a wasteful number, since it uses less digits than its factorization.

2129425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512 (or 4507 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 2129425 is about 1459.2549468821. The cubic root of 2129425 is about 128.6532562588.

The spelling of 2129425 in words is "two million, one hundred twenty-nine thousand, four hundred twenty-five".