445354421 has 4 divisors (see below), whose sum is σ = 460711500. Its totient is φ = 429997344.

The previous prime is 445354373. The next prime is 445354453. The reversal of 445354421 is 124453544.

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 139594225 + 305760196 = 11815^2 + 17486^2 .

It is a cyclic number.

It is not a de Polignac number, because 445354421 - 2¹⁰ = 445353397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445254421) 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, 7678496 + ... + 7678553.

It is an arithmetic number, because the mean of its divisors is an integer number (115177875).

Almost surely, 2^445354421 is an apocalyptic number.

It is an amenable number.

445354421 is a deficient number, since it is larger than the sum of its proper divisors (15357079).

445354421 is a wasteful number, since it uses less digits than its factorization.

445354421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15357078.

The product of its digits is 38400, while the sum is 32.

The square root of 445354421 is about 21103.4220210846. The cubic root of 445354421 is about 763.6633048760.

The spelling of 445354421 in words is "four hundred forty-five million, three hundred fifty-four thousand, four hundred twenty-one".