706642 has 4 divisors (see below), whose sum is σ = 1059966. Its totient is φ = 353320.

The previous prime is 706633. The next prime is 706661. The reversal of 706642 is 246607.

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., 447561 + 259081 = 669^2 + 509^2 .

It is an unprimeable number.

706642 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 as a sum of consecutive naturals, namely, 176659 + ... + 176662.

2⁷⁰⁶⁶⁴² is an apocalyptic number.

706642 is a deficient number, since it is larger than the sum of its proper divisors (353324).

706642 is a wasteful number, since it uses less digits than its factorization.

706642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353323.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 706642 is about 840.6200092789. The cubic root of 706642 is about 89.0703479490.

The spelling of 706642 in words is "seven hundred six thousand, six hundred forty-two".