5451421 has 8 divisors (see below), whose sum is σ = 5634360. Its totient is φ = 5271552.

The previous prime is 5451371. The next prime is 5451431. The reversal of 5451421 is 1241545.

It can be written as a sum of positive squares in 4 ways, for example, as 225625 + 5225796 = 475^2 + 2286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5451421 - 2⁷ = 5451293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5451392 and 5451401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451431) 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, 3165 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (704295).

Almost surely, 2^5451421 is an apocalyptic number.

It is an amenable number.

5451421 is a deficient number, since it is larger than the sum of its proper divisors (182939).

5451421 is a wasteful number, since it uses less digits than its factorization.

5451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535.

The product of its digits is 800, while the sum is 22.

The square root of 5451421 is about 2334.8278309117. The cubic root of 5451421 is about 175.9961797552.

Adding to 5451421 its reverse (1241545), we get a palindrome (6692966).

The spelling of 5451421 in words is "five million, four hundred fifty-one thousand, four hundred twenty-one".