805402 has 8 divisors (see below), whose sum is σ = 1301076. Its totient is φ = 371712.

The previous prime is 805397. The next prime is 805403. The reversal of 805402 is 204508.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 776161 + 29241 = 881^2 + 171^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 805402.

It is not an unprimeable number, because it can be changed into a prime (805403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15463 + ... + 15514.

2⁸⁰⁵⁴⁰² is an apocalyptic number.

805402 is a deficient number, since it is larger than the sum of its proper divisors (495674).

805402 is a wasteful number, since it uses less digits than its factorization.

805402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30992.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 805402 is about 897.4419201263. The cubic root of 805402 is about 93.0402569769.

It can be divided in two parts, 805 and 402, that multiplied together give a triangular number (323610 = T₈₀₄).

The spelling of 805402 in words is "eight hundred five thousand, four hundred two".