40529421 has 12 divisors (see below), whose sum is σ = 58848348. Its totient is φ = 26878464.

The previous prime is 40529417. The next prime is 40529429. The reversal of 40529421 is 12492504.

40529421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 35640900 = 2211^2 + 5970^2 .

It is not a de Polignac number, because 40529421 - 2² = 40529417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40529429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9930 + ... + 13403.

It is an arithmetic number, because the mean of its divisors is an integer number (4904029).

Almost surely, 2^40529421 is an apocalyptic number.

It is an amenable number.

40529421 is a deficient number, since it is larger than the sum of its proper divisors (18318927).

40529421 is a wasteful number, since it uses less digits than its factorization.

40529421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23532 (or 23529 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40529421 is about 6366.2721430991. The cubic root of 40529421 is about 343.4974097680.

The spelling of 40529421 in words is "forty million, five hundred twenty-nine thousand, four hundred twenty-one".