4201542521 has 16 divisors (see below), whose sum is σ = 4669814400. Its totient is φ = 3748187520.

The previous prime is 4201542517. The next prime is 4201542547. The reversal of 4201542521 is 1252451024.

It is not a de Polignac number, because 4201542521 - 2² = 4201542517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4201542551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146651 + ... + 172943.

It is an arithmetic number, because the mean of its divisors is an integer number (291863400).

Almost surely, 2^4201542521 is an apocalyptic number.

It is an amenable number.

4201542521 is a deficient number, since it is larger than the sum of its proper divisors (468271879).

4201542521 is a wasteful number, since it uses less digits than its factorization.

4201542521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26576.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4201542521 is about 64819.3066994703. The cubic root of 4201542521 is about 1613.6261414970.

Adding to 4201542521 its reverse (1252451024), we get a palindrome (5453993545).

The spelling of 4201542521 in words is "four billion, two hundred one million, five hundred forty-two thousand, five hundred twenty-one".