2405725 has 24 divisors (see below), whose sum is σ = 3481920. Its totient is φ = 1614720.

The previous prime is 2405707. The next prime is 2405729. The reversal of 2405725 is 5275042.

It is not a de Polignac number, because 2405725 - 2⁹ = 2405213 is a prime.

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

2405725 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2405725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10209 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (145080).

2^2405725 is an apocalyptic number.

2405725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2405725 is a deficient number, since it is larger than the sum of its proper divisors (1076195).

2405725 is a wasteful number, since it uses less digits than its factorization.

2405725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 2405725 is about 1551.0399736951. The cubic root of 2405725 is about 133.9929639136.

The spelling of 2405725 in words is "two million, four hundred five thousand, seven hundred twenty-five".