865442 has 4 divisors (see below), whose sum is σ = 1298166. Its totient is φ = 432720.

The previous prime is 865409. The next prime is 865457. The reversal of 865442 is 244568.

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

It can be written as a sum of positive squares in only one way, i.e., 863041 + 2401 = 929^2 + 49^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216359 + ... + 216362.

2⁸⁶⁵⁴⁴² is an apocalyptic number.

865442 is a deficient number, since it is larger than the sum of its proper divisors (432724).

865442 is a wasteful number, since it uses less digits than its factorization.

865442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432723.

The product of its digits is 7680, while the sum is 29.

The square root of 865442 is about 930.2913522118. The cubic root of 865442 is about 95.2970205266.

The spelling of 865442 in words is "eight hundred sixty-five thousand, four hundred forty-two".