40421532 has 12 divisors (see below), whose sum is σ = 94316936. Its totient is φ = 13473840.

The previous prime is 40421519. The next prime is 40421533. The reversal of 40421532 is 23512404.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 40421499 and 40421508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684219 + ... + 1684242.

Almost surely, 2^40421532 is an apocalyptic number.

It is an amenable number.

40421532 is an abundant number, since it is smaller than the sum of its proper divisors (53895404).

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

40421532 is a wasteful number, since it uses less digits than its factorization.

40421532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368468 (or 3368466 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40421532 is about 6357.7930133027. The cubic root of 40421532 is about 343.1923431114.

Adding to 40421532 its reverse (23512404), we get a palindrome (63933936).

The spelling of 40421532 in words is "forty million, four hundred twenty-one thousand, five hundred thirty-two".