421145536 has 56 divisors (see below), whose sum is σ = 962111360. Its totient is φ = 179165952.

The previous prime is 421145531. The next prime is 421145561. The reversal of 421145536 is 635541124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 421145498 and 421145507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421145531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58891 + ... + 65653.

It is an arithmetic number, because the mean of its divisors is an integer number (17180560).

Almost surely, 2^421145536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421145536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481055680).

421145536 is an abundant number, since it is smaller than the sum of its proper divisors (540965824).

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

421145536 is a wasteful number, since it uses less digits than its factorization.

421145536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6921 (or 6911 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 421145536 is about 20521.8307175554. The cubic root of 421145536 is about 749.5674756486.

The spelling of 421145536 in words is "four hundred twenty-one million, one hundred forty-five thousand, five hundred thirty-six".