40501243 has 4 divisors (see below), whose sum is σ = 40711288. Its totient is φ = 40291200.

The previous prime is 40501231. The next prime is 40501267. The reversal of 40501243 is 34210504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40501243 - 2⁹ = 40500731 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 40501243.

It is not an unprimeable number, because it can be changed into a prime (40501213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104733 + ... + 105118.

It is an arithmetic number, because the mean of its divisors is an integer number (10177822).

Almost surely, 2^40501243 is an apocalyptic number.

40501243 is a deficient number, since it is larger than the sum of its proper divisors (210045).

40501243 is a wasteful number, since it uses less digits than its factorization.

40501243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210044.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40501243 is about 6364.0586892328. The cubic root of 40501243 is about 343.4177860135.

Adding to 40501243 its reverse (34210504), we get a palindrome (74711747).

The spelling of 40501243 in words is "forty million, five hundred one thousand, two hundred forty-three".