1242424042 has 4 divisors (see below), whose sum is σ = 1863636066. Its totient is φ = 621212020.

The previous prime is 1242424033. The next prime is 1242424049. The reversal of 1242424042 is 2404242421.

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., 663011001 + 579413041 = 25749^2 + 24071^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1242423998 and 1242424016.

It is not an unprimeable number, because it can be changed into a prime (1242424049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310606009 + ... + 310606012.

Almost surely, 2^1242424042 is an apocalyptic number.

1242424042 is a deficient number, since it is larger than the sum of its proper divisors (621212024).

1242424042 is an equidigital number, since it uses as much as digits as its factorization.

1242424042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621212023.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1242424042 is about 35248.0360020243. The cubic root of 1242424042 is about 1075.0366793326.

Adding to 1242424042 its reverse (2404242421), we get a palindrome (3646666463).

The spelling of 1242424042 in words is "one billion, two hundred forty-two million, four hundred twenty-four thousand, forty-two".