2500625 has 10 divisors (see below), whose sum is σ = 3125562. Its totient is φ = 2000000.

The previous prime is 2500621. The next prime is 2500637. The reversal of 2500625 is 5260052.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 1697809 + 802816 = 1303^2 + 896^2 .

It is not a de Polignac number, because 2500625 - 2² = 2500621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2500597 and 2500606.

It is not an unprimeable number, because it can be changed into a prime (2500621) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 1376 + ... + 2625.

2^2500625 is an apocalyptic number.

2500625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2500625 is a deficient number, since it is larger than the sum of its proper divisors (624937).

2500625 is an frugal number, since it uses more digits than its factorization.

2500625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021 (or 4006 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2500625 is about 1581.3364600868. The cubic root of 2500625 is about 135.7321899608.

Adding to 2500625 its reverse (5260052), we get a palindrome (7760677).

It can be divided in two parts, 2500 and 625, that multiplied together give a square (1562500 = 1250²).

The spelling of 2500625 in words is "two million, five hundred thousand, six hundred twenty-five".