4542106821 has 8 divisors (see below), whose sum is σ = 6921305664. Its totient is φ = 2595489600.

The previous prime is 4542106819. The next prime is 4542106843. The reversal of 4542106821 is 1286012454.

It is a happy number.

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

It is not a de Polignac number, because 4542106821 - 2¹ = 4542106819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4542106021) 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, 108145380 + ... + 108145421.

It is an arithmetic number, because the mean of its divisors is an integer number (865163208).

Almost surely, 2^4542106821 is an apocalyptic number.

It is an amenable number.

4542106821 is a deficient number, since it is larger than the sum of its proper divisors (2379198843).

4542106821 is a wasteful number, since it uses less digits than its factorization.

4542106821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216290811.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 4542106821 is about 67395.1542842659. The cubic root of 4542106821 is about 1656.0970411376.

The spelling of 4542106821 in words is "four billion, five hundred forty-two million, one hundred six thousand, eight hundred twenty-one".