2561250 has 40 divisors (see below), whose sum is σ = 6410448. Its totient is φ = 682000.

The previous prime is 2561239. The next prime is 2561261. The reversal of 2561250 is 521652.

It is an interprime number because it is at equal distance from previous prime (2561239) and next prime (2561261).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3409 + ... + 4091.

2^2561250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2561250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3205224).

2561250 is an abundant number, since it is smaller than the sum of its proper divisors (3849198).

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

2561250 is an equidigital number, since it uses as much as digits as its factorization.

2561250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2561250 is about 1600.3905773279. The cubic root of 2561250 is about 136.8203374230.

The spelling of 2561250 in words is "two million, five hundred sixty-one thousand, two hundred fifty".