40421525 has 6 divisors (see below), whose sum is σ = 50122722. Its totient is φ = 32337200.

The previous prime is 40421519. The next prime is 40421533. The reversal of 40421525 is 52512404.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3964081 + 36457444 = 1991^2 + 6038^2 .

It is not a de Polignac number, because 40421525 - 2⁴ = 40421509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40421525.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 808406 + ... + 808455.

It is an arithmetic number, because the mean of its divisors is an integer number (8353787).

Almost surely, 2^40421525 is an apocalyptic number.

It is an amenable number.

40421525 is a deficient number, since it is larger than the sum of its proper divisors (9701197).

40421525 is a wasteful number, since it uses less digits than its factorization.

40421525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616871 (or 1616866 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 40421525 is about 6357.7924627971. The cubic root of 40421525 is about 343.1923233006.

Adding to 40421525 its reverse (52512404), we get a palindrome (92933929).

The spelling of 40421525 in words is "forty million, four hundred twenty-one thousand, five hundred twenty-five".