2001452421 has 8 divisors (see below), whose sum is σ = 2671510720. Its totient is φ = 1332847872.

The previous prime is 2001452413. The next prime is 2001452437. The reversal of 2001452421 is 1242541002.

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

It is not a de Polignac number, because 2001452421 - 2³ = 2001452413 is a prime.

It is a super-2 number, since 2×2001452421² = 8011623587053522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001452491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360220 + ... + 365733.

It is an arithmetic number, because the mean of its divisors is an integer number (333938840).

Almost surely, 2^2001452421 is an apocalyptic number.

It is an amenable number.

2001452421 is a deficient number, since it is larger than the sum of its proper divisors (670058299).

2001452421 is an equidigital number, since it uses as much as digits as its factorization.

2001452421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726875.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2001452421 is about 44737.5951633523. The cubic root of 2001452421 is about 1260.2259653944.

Adding to 2001452421 its reverse (1242541002), we get a palindrome (3243993423).

It can be divided in two parts, 200145 and 2421, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 2001452421 in words is "two billion, one million, four hundred fifty-two thousand, four hundred twenty-one".