861250 has 40 divisors (see below), whose sum is σ = 1771308. Its totient is φ = 312000.

The previous prime is 861239. The next prime is 861293. The reversal of 861250 is 52168.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 109561 + 751689 = 331^2 + 867^2 .

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 16224 + ... + 16276.

2⁸⁶¹²⁵⁰ is an apocalyptic number.

861250 is an abundant number, since it is smaller than the sum of its proper divisors (910058).

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

861250 is a wasteful number, since it uses less digits than its factorization.

861250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 861250 is about 928.0355596635. The cubic root of 861250 is about 95.1429058831.

It can be divided in two parts, 861 and 250, that added together give a palindrome (1111).

The spelling of 861250 in words is "eight hundred sixty-one thousand, two hundred fifty".