4221091842 has 32 divisors (see below), whose sum is σ = 9249215040. Its totient is φ = 1273624320.

The previous prime is 4221091837. The next prime is 4221091873. The reversal of 4221091842 is 2481901224.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121867 + ... + 152622.

It is an arithmetic number, because the mean of its divisors is an integer number (289037970).

Almost surely, 2^4221091842 is an apocalyptic number.

4221091842 is an abundant number, since it is smaller than the sum of its proper divisors (5028123198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221091842 is a wasteful number, since it uses less digits than its factorization.

4221091842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274738.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 4221091842 is about 64969.9302908661. The cubic root of 4221091842 is about 1616.1249456643.

The spelling of 4221091842 in words is "four billion, two hundred twenty-one million, ninety-one thousand, eight hundred forty-two".