4021145305 has 16 divisors (see below), whose sum is σ = 4848269184. Its totient is φ = 3201690240.

The previous prime is 4021145299. The next prime is 4021145327. The reversal of 4021145305 is 5035411204.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-4021145305 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021145305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1092949 + ... + 1096621.

It is an arithmetic number, because the mean of its divisors is an integer number (303016824).

Almost surely, 2^4021145305 is an apocalyptic number.

It is an amenable number.

4021145305 is a deficient number, since it is larger than the sum of its proper divisors (827123879).

4021145305 is a wasteful number, since it uses less digits than its factorization.

4021145305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4021145305 is about 63412.5011728760. The cubic root of 4021145305 is about 1590.1933107528.

Adding to 4021145305 its reverse (5035411204), we get a palindrome (9056556509).

The spelling of 4021145305 in words is "four billion, twenty-one million, one hundred forty-five thousand, three hundred five".