40512421 has 8 divisors (see below), whose sum is σ = 41488704. Its totient is φ = 39547200.

The previous prime is 40512419. The next prime is 40512457. The reversal of 40512421 is 12421504.

40512421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40512421 - 2¹ = 40512419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512491) 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 7 ways as a sum of consecutive naturals, for example, 4896 + ... + 10246.

It is an arithmetic number, because the mean of its divisors is an integer number (5186088).

Almost surely, 2^40512421 is an apocalyptic number.

It is an amenable number.

40512421 is a deficient number, since it is larger than the sum of its proper divisors (976283).

40512421 is a wasteful number, since it uses less digits than its factorization.

40512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 40512421 is about 6364.9368417919. The cubic root of 40512421 is about 343.4493765741.

Adding to 40512421 its reverse (12421504), we get a palindrome (52933925).

The spelling of 40512421 in words is "forty million, five hundred twelve thousand, four hundred twenty-one".