690242 has 16 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 289248.

The previous prime is 690233. The next prime is 690259. The reversal of 690242 is 242096.

It is an Ulam number.

It is a nialpdrome in base 16.

It is a zygodrome in base 6.

It is an unprimeable number.

690242 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 7 ways as a sum of consecutive naturals, for example, 134 + ... + 1182.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2⁶⁹⁰²⁴² is an apocalyptic number.

690242 is a deficient number, since it is larger than the sum of its proper divisors (519358).

690242 is a wasteful number, since it uses less digits than its factorization.

690242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 690242 is about 830.8080404040. The cubic root of 690242 is about 88.3758886761.

The spelling of 690242 in words is "six hundred ninety thousand, two hundred forty-two".