861404 has 6 divisors (see below), whose sum is σ = 1507464. Its totient is φ = 430700.

The previous prime is 861391. The next prime is 861433. The reversal of 861404 is 404168.

It is a happy number.

861404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 861404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861404.

It is an unprimeable number.

861404 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 as a sum of consecutive naturals, namely, 107672 + ... + 107679.

It is an arithmetic number, because the mean of its divisors is an integer number (251244).

2⁸⁶¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

861404 is a deficient number, since it is larger than the sum of its proper divisors (646060).

861404 is a wasteful number, since it uses less digits than its factorization.

861404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215355 (or 215353 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 861404 is about 928.1185269135. The cubic root of 861404 is about 95.1485763753.

The spelling of 861404 in words is "eight hundred sixty-one thousand, four hundred four".