42540641 has 8 divisors (see below), whose sum is σ = 49977984. Its totient is φ = 35698320.

The previous prime is 42540637. The next prime is 42540679. The reversal of 42540641 is 14604524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42540641 - 2² = 42540637 is a prime.

It is a super-2 number, since 2×42540641² = 3619412273381762, which contains 22 as substring.

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 42540641.

It is not an unprimeable number, because it can be changed into a prime (42540691) 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 7 ways as a sum of consecutive naturals, for example, 148601 + ... + 148886.

It is an arithmetic number, because the mean of its divisors is an integer number (6247248).

Almost surely, 2^42540641 is an apocalyptic number.

It is an amenable number.

42540641 is a deficient number, since it is larger than the sum of its proper divisors (7437343).

42540641 is a wasteful number, since it uses less digits than its factorization.

42540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297511.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42540641 is about 6522.3186827999. The cubic root of 42540641 is about 349.0878042254.

The spelling of 42540641 in words is "forty-two million, five hundred forty thousand, six hundred forty-one".