42273645 has 16 divisors (see below), whose sum is σ = 71616960. Its totient is φ = 21219584.

The previous prime is 42273631. The next prime is 42273659. The reversal of 42273645 is 54637224.

It is an interprime number because it is at equal distance from previous prime (42273631) and next prime (42273659).

It is a cyclic number.

It is not a de Polignac number, because 42273645 - 2⁸ = 42273389 is a prime.

It is a super-3 number, since 3×42273645³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82635 + ... + 83144.

It is an arithmetic number, because the mean of its divisors is an integer number (4476060).

Almost surely, 2^42273645 is an apocalyptic number.

It is an amenable number.

42273645 is a deficient number, since it is larger than the sum of its proper divisors (29343315).

42273645 is a wasteful number, since it uses less digits than its factorization.

42273645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165804.

The product of its digits is 40320, while the sum is 33.

The square root of 42273645 is about 6501.8185917480. The cubic root of 42273645 is about 348.3559493772.

The spelling of 42273645 in words is "forty-two million, two hundred seventy-three thousand, six hundred forty-five".