40053621 has 8 divisors (see below), whose sum is σ = 53434080. Its totient is φ = 26687792.

The previous prime is 40053619. The next prime is 40053623. The reversal of 40053621 is 12635004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40053619) and next prime (40053623).

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 40053621 - 2¹ = 40053619 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 (40053623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8710 + ... + 12488.

It is an arithmetic number, because the mean of its divisors is an integer number (6679260).

Almost surely, 2^40053621 is an apocalyptic number.

It is an amenable number.

40053621 is a deficient number, since it is larger than the sum of its proper divisors (13380459).

40053621 is a wasteful number, since it uses less digits than its factorization.

40053621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40053621 is about 6328.7930128896. The cubic root of 40053621 is about 342.1479388012.

Adding to 40053621 its reverse (12635004), we get a palindrome (52688625).

It can be divided in two parts, 4005 and 3621, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 40053621 in words is "forty million, fifty-three thousand, six hundred twenty-one".