2006451 has 24 divisors (see below), whose sum is σ = 3144960. Its totient is φ = 1275912.

The previous prime is 2006447. The next prime is 2006461. The reversal of 2006451 is 1546002.

It is a happy number.

2006451 is a `hidden beast` number, since 20 + 0 + 645 + 1 = 666.

It is not a de Polignac number, because 2006451 - 2² = 2006447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2006441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5410 + ... + 5768.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2^2006451 is an apocalyptic number.

2006451 is a deficient number, since it is larger than the sum of its proper divisors (1138509).

2006451 is an equidigital number, since it uses as much as digits as its factorization.

2006451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2006451 is about 1416.4924990977. The cubic root of 2006451 is about 126.1274221167.

The spelling of 2006451 in words is "two million, six thousand, four hundred fifty-one".