242090 has 16 divisors (see below), whose sum is σ = 446688. Its totient is φ = 94416.

The previous prime is 242083. The next prime is 242093. The reversal of 242090 is 90242.

242090 = 53² + 54² + ... + 95².

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (242093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149 + ... + 711.

It is an arithmetic number, because the mean of its divisors is an integer number (27918).

2²⁴²⁰⁹⁰ is an apocalyptic number.

242090 is a deficient number, since it is larger than the sum of its proper divisors (204598).

242090 is a wasteful number, since it uses less digits than its factorization.

242090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 242090 is about 492.0264220548. The cubic root of 242090 is about 62.3245211090.

The spelling of 242090 in words is "two hundred forty-two thousand, ninety".