40012541 has 4 divisors (see below), whose sum is σ = 40560732. Its totient is φ = 39464352.

The previous prime is 40012519. The next prime is 40012573. The reversal of 40012541 is 14521004.

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 6996025 + 33016516 = 2645^2 + 5746^2 .

It is a cyclic number.

It is not a de Polignac number, because 40012541 - 2⁶ = 40012477 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 (40012591) 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, 273986 + ... + 274131.

It is an arithmetic number, because the mean of its divisors is an integer number (10140183).

Almost surely, 2^40012541 is an apocalyptic number.

It is an amenable number.

40012541 is a deficient number, since it is larger than the sum of its proper divisors (548191).

40012541 is an equidigital number, since it uses as much as digits as its factorization.

40012541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548190.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40012541 is about 6325.5466957410. The cubic root of 40012541 is about 342.0309269480.

Adding to 40012541 its reverse (14521004), we get a palindrome (54533545).

The spelling of 40012541 in words is "forty million, twelve thousand, five hundred forty-one".