861427 has 8 divisors (see below), whose sum is σ = 994400. Its totient is φ = 730944.

The previous prime is 861391. The next prime is 861433. The reversal of 861427 is 724168.

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

It is a cyclic number.

It is not a de Polignac number, because 861427 - 2⁷ = 861299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861395 and 861404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (124300).

2⁸⁶¹⁴²⁷ is an apocalyptic number.

861427 is a deficient number, since it is larger than the sum of its proper divisors (132973).

861427 is a wasteful number, since it uses less digits than its factorization.

861427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245.

The product of its digits is 2688, while the sum is 28.

The square root of 861427 is about 928.1309174896. The cubic root of 861427 is about 95.1494232090.

The spelling of 861427 in words is "eight hundred sixty-one thousand, four hundred twenty-seven".