445133421 has 32 divisors (see below), whose sum is σ = 706763520. Its totient is φ = 276167232.

The previous prime is 445133419. The next prime is 445133431. The reversal of 445133421 is 124331544.

It is a happy number.

It is not a de Polignac number, because 445133421 - 2¹ = 445133419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445133431) 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 31 ways as a sum of consecutive naturals, for example, 13291 + ... + 32663.

It is an arithmetic number, because the mean of its divisors is an integer number (22086360).

Almost surely, 2^445133421 is an apocalyptic number.

It is an amenable number.

445133421 is a deficient number, since it is larger than the sum of its proper divisors (261630099).

445133421 is a wasteful number, since it uses less digits than its factorization.

445133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442 (or 19436 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 445133421 is about 21098.1852537132. The cubic root of 445133421 is about 763.5369654136.

Adding to 445133421 its reverse (124331544), we get a palindrome (569464965).

The spelling of 445133421 in words is "four hundred forty-five million, one hundred thirty-three thousand, four hundred twenty-one".