445125421 has 16 divisors (see below), whose sum is σ = 492755200. Its totient is φ = 399567168.

The previous prime is 445125349. The next prime is 445125487. The reversal of 445125421 is 124521544.

It is not a de Polignac number, because 445125421 - 2¹¹ = 445123373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445125421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445125491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65575 + ... + 72043.

It is an arithmetic number, because the mean of its divisors is an integer number (30797200).

Almost surely, 2^445125421 is an apocalyptic number.

It is an amenable number.

445125421 is a deficient number, since it is larger than the sum of its proper divisors (47629779).

445125421 is a wasteful number, since it uses less digits than its factorization.

445125421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628.

The product of its digits is 6400, while the sum is 28.

The square root of 445125421 is about 21097.9956630956. The cubic root of 445125421 is about 763.5323912552.

Adding to 445125421 its reverse (124521544), we get a palindrome (569646965).

The spelling of 445125421 in words is "four hundred forty-five million, one hundred twenty-five thousand, four hundred twenty-one".