4245201891 has 24 divisors (see below), whose sum is σ = 7009976064. Its totient is φ = 2425129200.

The previous prime is 4245201871. The next prime is 4245201899. The reversal of 4245201891 is 1981025424.

4245201891 is a `hidden beast` number, since 42 + 4 + 520 + 1 + 8 + 91 = 666.

It is not a de Polignac number, because 4245201891 - 2⁶ = 4245201827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4245201899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276466 + ... + 291416.

It is an arithmetic number, because the mean of its divisors is an integer number (292082336).

Almost surely, 2^4245201891 is an apocalyptic number.

4245201891 is a deficient number, since it is larger than the sum of its proper divisors (2764774173).

4245201891 is a wasteful number, since it uses less digits than its factorization.

4245201891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19471 (or 19468 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 4245201891 is about 65155.2138435597. The cubic root of 4245201891 is about 1619.1961020596.

The spelling of 4245201891 in words is "four billion, two hundred forty-five million, two hundred one thousand, eight hundred ninety-one".