242021765 has 4 divisors (see below), whose sum is σ = 290426124. Its totient is φ = 193617408.

The previous prime is 242021737. The next prime is 242021771. The reversal of 242021765 is 567120242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52519009 + 189502756 = 7247^2 + 13766^2 .

It is a cyclic number.

It is not a de Polignac number, because 242021765 - 2⁶ = 242021701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24202172 + ... + 24202181.

It is an arithmetic number, because the mean of its divisors is an integer number (72606531).

Almost surely, 2^242021765 is an apocalyptic number.

It is an amenable number.

242021765 is a deficient number, since it is larger than the sum of its proper divisors (48404359).

242021765 is an equidigital number, since it uses as much as digits as its factorization.

242021765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48404358.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 242021765 is about 15557.0487239708. The cubic root of 242021765 is about 623.1866500406.

The spelling of 242021765 in words is "two hundred forty-two million, twenty-one thousand, seven hundred sixty-five".