2509725 has 24 divisors (see below), whose sum is σ = 4201120. Its totient is φ = 1321920.

The previous prime is 2509721. The next prime is 2509757. The reversal of 2509725 is 5279052.

2509725 = T₂₂ + T₂₃ + ... + T₂₄₆.

It is a happy number.

It is not a de Polignac number, because 2509725 - 2² = 2509721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2509692 and 2509701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509721) 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, 8022 + ... + 8328.

2^2509725 is an apocalyptic number.

2509725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2509725 is a deficient number, since it is larger than the sum of its proper divisors (1691395).

2509725 is a wasteful number, since it uses less digits than its factorization.

2509725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 2509725 is about 1584.2111601677. The cubic root of 2509725 is about 135.8966378702.

The spelling of 2509725 in words is "two million, five hundred nine thousand, seven hundred twenty-five".