801439 has 4 divisors (see below), whose sum is σ = 843640.
Its totient is φ = 759240.
The previous prime is 801421. The next prime is 801461. The reversal of 801439 is 934108.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 801439 - 25 = 801407 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (801419) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21072 + ... + 21109.
It is an arithmetic number, because the mean of its divisors is an integer number (210910).
2801439 is an apocalyptic number.
801439 is a deficient number, since it is larger than the sum of its proper divisors (42201).
801439 is a wasteful number, since it uses less digits than its factorization.
801439 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 42200.
The product of its (nonzero) digits is 864, while the sum is 25.
The square root of 801439 is about 895.2312550397.
The cubic root of 801439 is about 92.8874037186.
The spelling of 801439 in words is "eight hundred one thousand, four hundred thirty-nine".