1242042213 has 8 divisors (see below), whose sum is σ = 1657004800. Its totient is φ = 827553888.

The previous prime is 1242042203. The next prime is 1242042271. The reversal of 1242042213 is 3122402421.

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

It is not a de Polignac number, because 1242042213 - 2¹⁶ = 1241976677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242042213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242042203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112408 + ... + 122961.

It is an arithmetic number, because the mean of its divisors is an integer number (207125600).

Almost surely, 2^1242042213 is an apocalyptic number.

It is an amenable number.

1242042213 is a deficient number, since it is larger than the sum of its proper divisors (414962587).

1242042213 is a wasteful number, since it uses less digits than its factorization.

1242042213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237131.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242042213 is about 35242.6192698556. The cubic root of 1242042213 is about 1074.9265392022.

Adding to 1242042213 its reverse (3122402421), we get a palindrome (4364444634).

The spelling of 1242042213 in words is "one billion, two hundred forty-two million, forty-two thousand, two hundred thirteen".