420121444 has 6 divisors (see below), whose sum is σ = 735212534. Its totient is φ = 210060720.

The previous prime is 420121441. The next prime is 420121469. The reversal of 420121444 is 444121024.

It can be written as a sum of positive squares in only one way, i.e., 311169600 + 108951844 = 17640^2 + 10438^2 .

It is not an unprimeable number, because it can be changed into a prime (420121441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52515177 + ... + 52515184.

Almost surely, 2^420121444 is an apocalyptic number.

It is an amenable number.

420121444 is a deficient number, since it is larger than the sum of its proper divisors (315091090).

420121444 is a wasteful number, since it uses less digits than its factorization.

420121444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105030365 (or 105030363 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 420121444 is about 20496.8642479771. The cubic root of 420121444 is about 748.9594126086.

Adding to 420121444 its reverse (444121024), we get a palindrome (864242468).

The spelling of 420121444 in words is "four hundred twenty million, one hundred twenty-one thousand, four hundred forty-four".