861478 has 4 divisors (see below), whose sum is σ = 1292220. Its totient is φ = 430738.

The previous prime is 861439. The next prime is 861491. The reversal of 861478 is 874168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

861478 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, 215368 + ... + 215371.

It is an arithmetic number, because the mean of its divisors is an integer number (323055).

2⁸⁶¹⁴⁷⁸ is an apocalyptic number.

861478 is a deficient number, since it is larger than the sum of its proper divisors (430742).

861478 is a wasteful number, since it uses less digits than its factorization.

861478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430741.

The product of its digits is 10752, while the sum is 34.

The square root of 861478 is about 928.1583916552. The cubic root of 861478 is about 95.1513009169.

The spelling of 861478 in words is "eight hundred sixty-one thousand, four hundred seventy-eight".