242252021 has 8 divisors (see below), whose sum is σ = 264600000. Its totient is φ = 219958240.

The previous prime is 242251991. The next prime is 242252063. The reversal of 242252021 is 120252242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242252021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242251984 and 242252002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242252221) 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, 3896 + ... + 22353.

It is an arithmetic number, because the mean of its divisors is an integer number (33075000).

Almost surely, 2^242252021 is an apocalyptic number.

It is an amenable number.

242252021 is a deficient number, since it is larger than the sum of its proper divisors (22347979).

242252021 is a wasteful number, since it uses less digits than its factorization.

242252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27099.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 242252021 is about 15564.4473400118. The cubic root of 242252021 is about 623.3842176489.

The spelling of 242252021 in words is "two hundred forty-two million, two hundred fifty-two thousand, twenty-one".