2531250 has 70 divisors (see below), whose sum is σ = 7089753. Its totient is φ = 675000.

The previous prime is 2531233. The next prime is 2531261. The reversal of 2531250 is 521352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 2099601 = 657^2 + 1449^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1125.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 5.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 34 ways as a sum of consecutive naturals, for example, 506248 + ... + 506252.

2^2531250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531250

2531250 is an abundant number, since it is smaller than the sum of its proper divisors (4558503).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531250 is an frugal number, since it uses more digits than its factorization.

2531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2531250 is about 1590.9902576697. The cubic root of 2531250 is about 136.2840444624.

Multiplying 2531250 by its sum of digits (18), we get a square (45562500 = 6750²).

2531250 divided by its sum of digits (18) gives a square (140625 = 375²).

The spelling of 2531250 in words is "two million, five hundred thirty-one thousand, two hundred fifty".