817425 has 48 divisors (see below), whose sum is σ = 1726080. Its totient is φ = 371520.

The previous prime is 817409. The next prime is 817433. The reversal of 817425 is 524718.

It is not a de Polignac number, because 817425 - 2⁴ = 817409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4639 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (35960).

2⁸¹⁷⁴²⁵ is an apocalyptic number.

It is an amenable number.

817425 is an abundant number, since it is smaller than the sum of its proper divisors (908655).

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

817425 is a wasteful number, since it uses less digits than its factorization.

817425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 817425 is about 904.1155899552. The cubic root of 817425 is about 93.5009389174.

The spelling of 817425 in words is "eight hundred seventeen thousand, four hundred twenty-five".