4287201021 has 32 divisors (see below), whose sum is σ = 6827980800. Its totient is φ = 2650080240.

The previous prime is 4287201011. The next prime is 4287201029. The reversal of 4287201021 is 1201027824.

It is not a de Polignac number, because 4287201021 - 2¹³ = 4287192829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4287201029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64795 + ... + 113016.

It is an arithmetic number, because the mean of its divisors is an integer number (213374400).

Almost surely, 2^4287201021 is an apocalyptic number.

It is an amenable number.

4287201021 is a deficient number, since it is larger than the sum of its proper divisors (2540779779).

4287201021 is a wasteful number, since it uses less digits than its factorization.

4287201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177886 (or 177880 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 4287201021 is about 65476.7212144897. The cubic root of 4287201021 is about 1624.5183293197.

Adding to 4287201021 its reverse (1201027824), we get a palindrome (5488228845).

The spelling of 4287201021 in words is "four billion, two hundred eighty-seven million, two hundred one thousand, twenty-one".