709642 has 8 divisors (see below), whose sum is σ = 1110816. Its totient is φ = 339372.

The previous prime is 709609. The next prime is 709649. The reversal of 709642 is 246907.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 709642.

It is not an unprimeable number, because it can be changed into a prime (709649) by changing a digit.

709642 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 in 3 ways as a sum of consecutive naturals, for example, 7668 + ... + 7759.

It is an arithmetic number, because the mean of its divisors is an integer number (138852).

2⁷⁰⁹⁶⁴² is an apocalyptic number.

709642 is a deficient number, since it is larger than the sum of its proper divisors (401174).

709642 is a wasteful number, since it uses less digits than its factorization.

709642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15452.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 709642 is about 842.4025166154. The cubic root of 709642 is about 89.1962173384.

The spelling of 709642 in words is "seven hundred nine thousand, six hundred forty-two".