820254 has 8 divisors (see below), whose sum is σ = 1640520. Its totient is φ = 273416.

The previous prime is 820247. The next prime is 820271. The reversal of 820254 is 452028.

It is a sphenic number, since it is the product of 3 distinct primes.

820254 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 820254.

It is a congruent number.

It is an unprimeable number.

820254 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 3 ways as a sum of consecutive naturals, for example, 68349 + ... + 68360.

It is an arithmetic number, because the mean of its divisors is an integer number (205065).

2⁸²⁰²⁵⁴ is an apocalyptic number.

820254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

820254 is a wasteful number, since it uses less digits than its factorization.

820254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136714.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 820254 is about 905.6787509929. The cubic root of 820254 is about 93.6086795224.

It can be divided in two parts, 8202 and 54, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 820254 in words is "eight hundred twenty thousand, two hundred fifty-four".