42012641 has 4 divisors (see below), whose sum is σ = 45831984. Its totient is φ = 38193300.

The previous prime is 42012637. The next prime is 42012647. The reversal of 42012641 is 14621024.

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 42012641 - 2² = 42012637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42012647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909655 + ... + 1909676.

It is an arithmetic number, because the mean of its divisors is an integer number (11457996).

Almost surely, 2^42012641 is an apocalyptic number.

It is an amenable number.

42012641 is a deficient number, since it is larger than the sum of its proper divisors (3819343).

42012641 is a wasteful number, since it uses less digits than its factorization.

42012641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819342.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 42012641 is about 6481.7158993587. The cubic root of 42012641 is about 347.6375343658.

Adding to 42012641 its reverse (14621024), we get a palindrome (56633665).

The spelling of 42012641 in words is "forty-two million, twelve thousand, six hundred forty-one".