5451999 has 8 divisors (see below), whose sum is σ = 8307840. Its totient is φ = 3115416.

The previous prime is 5451961. The next prime is 5452009. The reversal of 5451999 is 9991545.

It is a happy number.

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

It is not a de Polignac number, because 5451999 - 2⁷ = 5451871 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 5451999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451959) 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 7 ways as a sum of consecutive naturals, for example, 129789 + ... + 129830.

It is an arithmetic number, because the mean of its divisors is an integer number (1038480).

Almost surely, 2^5451999 is an apocalyptic number.

5451999 is a deficient number, since it is larger than the sum of its proper divisors (2855841).

5451999 is a wasteful number, since it uses less digits than its factorization.

5451999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259629.

The product of its digits is 72900, while the sum is 42.

The square root of 5451999 is about 2334.9516054942. The cubic root of 5451999 is about 176.0023996746.

The spelling of 5451999 in words is "five million, four hundred fifty-one thousand, nine hundred ninety-nine".