242990 has 24 divisors (see below), whose sum is σ = 487512. Its totient is φ = 86480.

The previous prime is 242989. The next prime is 242999. The reversal of 242990 is 99242.

242990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5147 + ... + 5193.

It is an arithmetic number, because the mean of its divisors is an integer number (20313).

2²⁴²⁹⁹⁰ is an apocalyptic number.

242990 is an abundant number, since it is smaller than the sum of its proper divisors (244522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242990 is a wasteful number, since it uses less digits than its factorization.

242990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 242990 is about 492.9401586400. The cubic root of 242990 is about 62.4016586782.

The spelling of 242990 in words is "two hundred forty-two thousand, nine hundred ninety".