3999451 has 4 divisors (see below), whose sum is σ = 4054312. Its totient is φ = 3944592.

The previous prime is 3999449. The next prime is 3999461. The reversal of 3999451 is 1549993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1549993 = 23 ⋅67391.

It is a cyclic number.

It is not a de Polignac number, because 3999451 - 2¹ = 3999449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27321 + ... + 27466.

It is an arithmetic number, because the mean of its divisors is an integer number (1013578).

Almost surely, 2^3999451 is an apocalyptic number.

3999451 is a deficient number, since it is larger than the sum of its proper divisors (54861).

3999451 is an equidigital number, since it uses as much as digits as its factorization.

3999451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54860.

The product of its digits is 43740, while the sum is 40.

The square root of 3999451 is about 1999.8627452903. The cubic root of 3999451 is about 158.7328425047.

The spelling of 3999451 in words is "three million, nine hundred ninety-nine thousand, four hundred fifty-one".