40423541 has 4 divisors (see below), whose sum is σ = 41086284. Its totient is φ = 39760800.

The previous prime is 40423529. The next prime is 40423543. The reversal of 40423541 is 14532404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5080516 + 35343025 = 2254^2 + 5945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40423541 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 (40423543) 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, 331280 + ... + 331401.

It is an arithmetic number, because the mean of its divisors is an integer number (10271571).

Almost surely, 2^40423541 is an apocalyptic number.

It is an amenable number.

40423541 is a deficient number, since it is larger than the sum of its proper divisors (662743).

40423541 is an equidigital number, since it uses as much as digits as its factorization.

40423541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662742.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40423541 is about 6357.9510064171. The cubic root of 40423541 is about 343.1980287114.

Adding to 40423541 its reverse (14532404), we get a palindrome (54955945).

The spelling of 40423541 in words is "forty million, four hundred twenty-three thousand, five hundred forty-one".