242640722 has 4 divisors (see below), whose sum is σ = 363961086. Its totient is φ = 121320360.

The previous prime is 242640721. The next prime is 242640733. The reversal of 242640722 is 227046242.

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 only one way, i.e., 135745801 + 106894921 = 11651^2 + 10339^2 .

It is not an unprimeable number, because it can be changed into a prime (242640721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660179 + ... + 60660182.

Almost surely, 2^242640722 is an apocalyptic number.

242640722 is a deficient number, since it is larger than the sum of its proper divisors (121320364).

242640722 is a wasteful number, since it uses less digits than its factorization.

242640722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121320363.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 242640722 is about 15576.9291582134. The cubic root of 242640722 is about 623.7174526894.

Adding to 242640722 its reverse (227046242), we get a palindrome (469686964).

The spelling of 242640722 in words is "two hundred forty-two million, six hundred forty thousand, seven hundred twenty-two".