40212141 has 4 divisors (see below), whose sum is σ = 53616192. Its totient is φ = 26808092.

The previous prime is 40212131. The next prime is 40212143. The reversal of 40212141 is 14121204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40212141 - 2¹⁰ = 40211117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40212141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40212143) 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, 6702021 + ... + 6702026.

It is an arithmetic number, because the mean of its divisors is an integer number (13404048).

Almost surely, 2^40212141 is an apocalyptic number.

It is an amenable number.

40212141 is a deficient number, since it is larger than the sum of its proper divisors (13404051).

40212141 is a wasteful number, since it uses less digits than its factorization.

40212141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13404050.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 40212141 is about 6341.3043610917. The cubic root of 40212141 is about 342.5987169936.

Adding to 40212141 its reverse (14121204), we get a palindrome (54333345).

The spelling of 40212141 in words is "forty million, two hundred twelve thousand, one hundred forty-one".