815250 has 32 divisors (see below), whose sum is σ = 2036736. Its totient is φ = 217200.

The previous prime is 815231. The next prime is 815251. The reversal of 815250 is 52518.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 815250.

It is not an unprimeable number, because it can be changed into a prime (815251) by changing a digit.

815250 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (63648).

2⁸¹⁵²⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 815250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018368).

815250 is an abundant number, since it is smaller than the sum of its proper divisors (1221486).

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

815250 is a wasteful number, since it uses less digits than its factorization.

815250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 815250 is about 902.9119558407. The cubic root of 815250 is about 93.4179363261.

Adding to 815250 its reverse (52518), we get a palindrome (867768).

The spelling of 815250 in words is "eight hundred fifteen thousand, two hundred fifty".