2578625 has 24 divisors (see below), whose sum is σ = 3752424. Its totient is φ = 1764000.

The previous prime is 2578621. The next prime is 2578643. The reversal of 2578625 is 5268752.

It can be written as a sum of positive squares in 4 ways, for example, as 753424 + 1825201 = 868^2 + 1351^2 .

It is not a de Polignac number, because 2578625 - 2² = 2578621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578621) 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, 5915 + ... + 6335.

It is an arithmetic number, because the mean of its divisors is an integer number (156351).

2^2578625 is an apocalyptic number.

2578625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578625 is a deficient number, since it is larger than the sum of its proper divisors (1173799).

2578625 is an equidigital number, since it uses as much as digits as its factorization.

2578625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 433 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 2578625 is about 1605.8097645736. The cubic root of 2578625 is about 137.1290275717.

The spelling of 2578625 in words is "two million, five hundred seventy-eight thousand, six hundred twenty-five".