242640242 has 16 divisors (see below), whose sum is σ = 394594200. Its totient is φ = 111234432.

The previous prime is 242640227. The next prime is 242640253. The reversal of 242640242 is 242046242.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76720081 + 165920161 = 8759^2 + 12881^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27443 + ... + 35190.

Almost surely, 2^242640242 is an apocalyptic number.

242640242 is a deficient number, since it is larger than the sum of its proper divisors (151953958).

242640242 is a wasteful number, since it uses less digits than its factorization.

242640242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62797.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 242640242 is about 15576.9137508044. The cubic root of 242640242 is about 623.7170414029.

Adding to 242640242 its reverse (242046242), we get a palindrome (484686484).

The spelling of 242640242 in words is "two hundred forty-two million, six hundred forty thousand, two hundred forty-two".