1242520642 has 8 divisors (see below), whose sum is σ = 2033215632. Its totient is φ = 564782100.

The previous prime is 1242520613. The next prime is 1242520649. The reversal of 1242520642 is 2460252421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1242520642.

It is not an unprimeable number, because it can be changed into a prime (1242520649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28239084 + ... + 28239127.

It is an arithmetic number, because the mean of its divisors is an integer number (254151954).

Almost surely, 2^1242520642 is an apocalyptic number.

1242520642 is a deficient number, since it is larger than the sum of its proper divisors (790694990).

1242520642 is a wasteful number, since it uses less digits than its factorization.

1242520642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56478224.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1242520642 is about 35249.4062645032. The cubic root of 1242520642 is about 1075.0645404193.

The spelling of 1242520642 in words is "one billion, two hundred forty-two million, five hundred twenty thousand, six hundred forty-two".