811402 has 4 divisors (see below), whose sum is σ = 1217106. Its totient is φ = 405700.

The previous prime is 811387. The next prime is 811411. The reversal of 811402 is 204118.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204118 = 2 ⋅102059.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 90601 = 849^2 + 301^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202849 + ... + 202852.

2⁸¹¹⁴⁰² is an apocalyptic number.

811402 is a deficient number, since it is larger than the sum of its proper divisors (405704).

811402 is a wasteful number, since it uses less digits than its factorization.

811402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405703.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 811402 is about 900.7785521425. The cubic root of 811402 is about 93.2707261536.

The spelling of 811402 in words is "eight hundred eleven thousand, four hundred two".