4242002521 has 8 divisors (see below), whose sum is σ = 4529836800. Its totient is φ = 3963605520.

The previous prime is 4242002507. The next prime is 4242002549. The reversal of 4242002521 is 1252002424.

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

It is a cyclic number.

It is not a de Polignac number, because 4242002521 - 2²⁹ = 3705131609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4242002492 and 4242002501.

It is not an unprimeable number, because it can be changed into a prime (4242002551) 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, 2358391 + ... + 2360188.

It is an arithmetic number, because the mean of its divisors is an integer number (566229600).

Almost surely, 2^4242002521 is an apocalyptic number.

It is an amenable number.

4242002521 is a deficient number, since it is larger than the sum of its proper divisors (287834279).

4242002521 is a wasteful number, since it uses less digits than its factorization.

4242002521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4718639.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 4242002521 is about 65130.6573051432. The cubic root of 4242002521 is about 1618.7892341410.

Adding to 4242002521 its reverse (1252002424), we get a palindrome (5494004945).

The spelling of 4242002521 in words is "four billion, two hundred forty-two million, two thousand, five hundred twenty-one".