2001451 has 2 divisors, whose sum is σ = 2001452. Its totient is φ = 2001450.

The previous prime is 2001449. The next prime is 2001463. The reversal of 2001451 is 1541002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001451 - 2¹ = 2001449 is a prime.

It is a super-2 number, since 2×2001451² = 8011612210802, which contains 22 as substring.

Together with 2001449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2001421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000725 + 1000726.

It is an arithmetic number, because the mean of its divisors is an integer number (1000726).

2^2001451 is an apocalyptic number.

2001451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001451 is an equidigital number, since it uses as much as digits as its factorization.

2001451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2001451 is about 1414.7264753301. The cubic root of 2001451 is about 126.0225667147.

Adding to 2001451 its reverse (1541002), we get a palindrome (3542453).

The spelling of 2001451 in words is "two million, one thousand, four hundred fifty-one".