864742 has 8 divisors (see below), whose sum is σ = 1301976. Its totient is φ = 430752.

The previous prime is 864737. The next prime is 864757. The reversal of 864742 is 247468.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (162747).

2⁸⁶⁴⁷⁴² is an apocalyptic number.

864742 is a deficient number, since it is larger than the sum of its proper divisors (437234).

864742 is a wasteful number, since it uses less digits than its factorization.

864742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 10752, while the sum is 31.

The square root of 864742 is about 929.9150498836. The cubic root of 864742 is about 95.2713203996.

The spelling of 864742 in words is "eight hundred sixty-four thousand, seven hundred forty-two".