5451521 has 4 divisors (see below), whose sum is σ = 5469252. Its totient is φ = 5433792.

The previous prime is 5451503. The next prime is 5451547. The reversal of 5451521 is 1251545.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2283121 + 3168400 = 1511^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 5451521 - 2¹⁸ = 5189377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5453521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8396 + ... + 9021.

It is an arithmetic number, because the mean of its divisors is an integer number (1367313).

Almost surely, 2^5451521 is an apocalyptic number.

It is an amenable number.

5451521 is a deficient number, since it is larger than the sum of its proper divisors (17731).

5451521 is a wasteful number, since it uses less digits than its factorization.

5451521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17730.

The product of its digits is 1000, while the sum is 23.

The square root of 5451521 is about 2334.8492456688. The cubic root of 5451521 is about 175.9972558973.

The spelling of 5451521 in words is "five million, four hundred fifty-one thousand, five hundred twenty-one".