40037421 has 8 divisors (see below), whose sum is σ = 53767840. Its totient is φ = 26499312.

The previous prime is 40037401. The next prime is 40037423. The reversal of 40037421 is 12473004.

40037421 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 not a de Polignac number, because 40037421 - 2⁶ = 40037357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40037423) 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, 47590 + ... + 48423.

It is an arithmetic number, because the mean of its divisors is an integer number (6720980).

Almost surely, 2^40037421 is an apocalyptic number.

It is an amenable number.

40037421 is a deficient number, since it is larger than the sum of its proper divisors (13730419).

40037421 is a wasteful number, since it uses less digits than its factorization.

40037421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96155.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40037421 is about 6327.5130185563. The cubic root of 40037421 is about 342.1018044450.

The spelling of 40037421 in words is "forty million, thirty-seven thousand, four hundred twenty-one".