45421247421 has 80 divisors (see below), whose sum is σ = 75710764800. Its totient is φ = 26906256000.

The previous prime is 45421247381. The next prime is 45421247453. The reversal of 45421247421 is 12474212454.

45421247421 is a `hidden beast` number, since 4 + 542 + 1 + 24 + 74 + 21 = 666.

It is not a de Polignac number, because 45421247421 - 2⁷ = 45421247293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45421247491) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7106095 + ... + 7112483.

It is an arithmetic number, because the mean of its divisors is an integer number (946384560).

Almost surely, 2^45421247421 is an apocalyptic number.

It is an amenable number.

45421247421 is a deficient number, since it is larger than the sum of its proper divisors (30289517379).

45421247421 is a wasteful number, since it uses less digits than its factorization.

45421247421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592 (or 6583 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

Adding to 45421247421 its reverse (12474212454), we get a palindrome (57895459875).

The spelling of 45421247421 in words is "forty-five billion, four hundred twenty-one million, two hundred forty-seven thousand, four hundred twenty-one".