445040521 has 4 divisors (see below), whose sum is σ = 447875332. Its totient is φ = 442205712.

The previous prime is 445040513. The next prime is 445040539. The reversal of 445040521 is 125040544.

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 191434896 + 253605625 = 13836^2 + 15925^2 .

It is a cyclic number.

It is not a de Polignac number, because 445040521 - 2³ = 445040513 is a prime.

It is a super-2 number, since 2×445040521² = 396122130663902882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445040221) 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, 1417170 + ... + 1417483.

It is an arithmetic number, because the mean of its divisors is an integer number (111968833).

Almost surely, 2^445040521 is an apocalyptic number.

It is an amenable number.

445040521 is a deficient number, since it is larger than the sum of its proper divisors (2834811).

445040521 is a wasteful number, since it uses less digits than its factorization.

445040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834810.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 445040521 is about 21095.9835276765. The cubic root of 445040521 is about 763.4838446218.

The spelling of 445040521 in words is "four hundred forty-five million, forty thousand, five hundred twenty-one".