817402 has 4 divisors (see below), whose sum is σ = 1226106. Its totient is φ = 408700.

The previous prime is 817379. The next prime is 817403. The reversal of 817402 is 204718.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204718 = 2 ⋅102359.

It can be written as a sum of positive squares in only one way, i.e., 502681 + 314721 = 709^2 + 561^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (817403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204349 + ... + 204352.

2⁸¹⁷⁴⁰² is an apocalyptic number.

817402 is a deficient number, since it is larger than the sum of its proper divisors (408704).

817402 is a wasteful number, since it uses less digits than its factorization.

817402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408703.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 817402 is about 904.1028702532. The cubic root of 817402 is about 93.5000619596.

The spelling of 817402 in words is "eight hundred seventeen thousand, four hundred two".