242028681 has 4 divisors (see below), whose sum is σ = 322704912. Its totient is φ = 161352452.

The previous prime is 242028673. The next prime is 242028691. The reversal of 242028681 is 186820242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242028681 - 2³ = 242028673 is a prime.

It is a super-2 number, since 2×242028681² = 117155764853199522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242028601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40338111 + ... + 40338116.

It is an arithmetic number, because the mean of its divisors is an integer number (80676228).

Almost surely, 2^242028681 is an apocalyptic number.

It is an amenable number.

242028681 is a deficient number, since it is larger than the sum of its proper divisors (80676231).

242028681 is an equidigital number, since it uses as much as digits as its factorization.

242028681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80676230.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 242028681 is about 15557.2710010464. The cubic root of 242028681 is about 623.1925860327.

The spelling of 242028681 in words is "two hundred forty-two million, twenty-eight thousand, six hundred eighty-one".