242690 has 16 divisors (see below), whose sum is σ = 499392. Its totient is φ = 83184.

The previous prime is 242689. The next prime is 242713. The reversal of 242690 is 96242.

It is a super-2 number, since 2×242690² = 117796872200, which contains 22 as substring.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664 + ... + 1803.

It is an arithmetic number, because the mean of its divisors is an integer number (31212).

2²⁴²⁶⁹⁰ is an apocalyptic number.

242690 is an abundant number, since it is smaller than the sum of its proper divisors (256702).

It is a weird number, because it is abundant, but not a pseudoperfect number.

242690 is a wasteful number, since it uses less digits than its factorization.

242690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481.

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

The square root of 242690 is about 492.6357680884. The cubic root of 242690 is about 62.3759673506.

The spelling of 242690 in words is "two hundred forty-two thousand, six hundred ninety".