421020444562 has 4 divisors (see below), whose sum is σ = 631530666846. Its totient is φ = 210510222280.

The previous prime is 421020444487. The next prime is 421020444563. The reversal of 421020444562 is 265444020124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 415688378121 + 5332066441 = 644739^2 + 73021^2 .

It is not an unprimeable number, because it can be changed into a prime (421020444563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105255111139 + ... + 105255111142.

Almost surely, 2^421020444562 is an apocalyptic number.

421020444562 is a deficient number, since it is larger than the sum of its proper divisors (210510222284).

421020444562 is a wasteful number, since it uses less digits than its factorization.

421020444562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210510222283.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 421020444562 its reverse (265444020124), we get a palindrome (686464464686).

The spelling of 421020444562 in words is "four hundred twenty-one billion, twenty million, four hundred forty-four thousand, five hundred sixty-two".