445121420 has 24 divisors (see below), whose sum is σ = 957555648. Its totient is φ = 173705600.

The previous prime is 445121399. The next prime is 445121431. The reversal of 445121420 is 24121544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270596 + ... + 272235.

It is an arithmetic number, because the mean of its divisors is an integer number (39898152).

Almost surely, 2^445121420 is an apocalyptic number.

It is an amenable number.

445121420 is an abundant number, since it is smaller than the sum of its proper divisors (512434228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445121420 is a wasteful number, since it uses less digits than its factorization.

445121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542881 (or 542879 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 445121420 is about 21097.9008434489. The cubic root of 445121420 is about 763.5301035837.

Adding to 445121420 its reverse (24121544), we get a palindrome (469242964).

The spelling of 445121420 in words is "four hundred forty-five million, one hundred twenty-one thousand, four hundred twenty".