42101645 has 8 divisors (see below), whose sum is σ = 50569056. Its totient is φ = 33649936.

The previous prime is 42101641. The next prime is 42101659. The reversal of 42101645 is 54610124.

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 42101645 - 2² = 42101641 is a prime.

It is a super-3 number, since 3×42101645³ (a number of 24 digits) contains 333 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 42101645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3134 + ... + 9696.

It is an arithmetic number, because the mean of its divisors is an integer number (6321132).

Almost surely, 2^42101645 is an apocalyptic number.

It is an amenable number.

42101645 is a deficient number, since it is larger than the sum of its proper divisors (8467411).

42101645 is a wasteful number, since it uses less digits than its factorization.

42101645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 42101645 is about 6488.5780414510. The cubic root of 42101645 is about 347.8828518576.

Adding to 42101645 its reverse (54610124), we get a palindrome (96711769).

The spelling of 42101645 in words is "forty-two million, one hundred one thousand, six hundred forty-five".