5451021 has 12 divisors (see below), whose sum is σ = 8003580. Its totient is φ = 3574080.

The previous prime is 5451001. The next prime is 5451029. The reversal of 5451021 is 1201545.

It can be written as a sum of positive squares in 2 ways, for example, as 562500 + 4888521 = 750^2 + 2211^2 .

It is not a de Polignac number, because 5451021 - 2⁵ = 5450989 is a prime.

It is a Curzon number.

5451021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5450985 and 5451003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451029) 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 in 11 ways as a sum of consecutive naturals, for example, 4416 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (666965).

Almost surely, 2^5451021 is an apocalyptic number.

It is an amenable number.

5451021 is a deficient number, since it is larger than the sum of its proper divisors (2552559).

5451021 is a wasteful number, since it uses less digits than its factorization.

5451021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9996 (or 9993 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 5451021 is about 2334.7421699194. The cubic root of 5451021 is about 175.9918750554.

Adding to 5451021 its reverse (1201545), we get a palindrome (6652566).

The spelling of 5451021 in words is "five million, four hundred fifty-one thousand, twenty-one".