4242051081 has 40 divisors (see below), whose sum is σ = 6459852168. Its totient is φ = 2773440000.

The previous prime is 4242051061. The next prime is 4242051083. The reversal of 4242051081 is 1801502424.

It can be written as a sum of positive squares in 4 ways, for example, as 1835265600 + 2406785481 = 42840^2 + 49059^2 .

It is not a de Polignac number, because 4242051081 - 2¹⁴ = 4242034697 is a prime.

It is a super-2 number, since 2×4242051081² = 35989994747626537122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4242051083) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1980271 + ... + 1982411.

Almost surely, 2^4242051081 is an apocalyptic number.

It is an amenable number.

4242051081 is a deficient number, since it is larger than the sum of its proper divisors (2217801087).

4242051081 is a wasteful number, since it uses less digits than its factorization.

4242051081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615 (or 2606 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 4242051081 is about 65131.0300931898. The cubic root of 4242051081 is about 1618.7954111061.

The spelling of 4242051081 in words is "four billion, two hundred forty-two million, fifty-one thousand, eighty-one".