42272645 has 16 divisors (see below), whose sum is σ = 51789888. Its totient is φ = 33116160.

The previous prime is 42272639. The next prime is 42272651. The reversal of 42272645 is 54627224.

It is an interprime number because it is at equal distance from previous prime (42272639) and next prime (42272651).

It is not a de Polignac number, because 42272645 - 2¹⁴ = 42256261 is a prime.

It is a super-3 number, since 3×42272645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

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, 85850 + ... + 86340.

It is an arithmetic number, because the mean of its divisors is an integer number (3236868).

Almost surely, 2^42272645 is an apocalyptic number.

It is an amenable number.

42272645 is a deficient number, since it is larger than the sum of its proper divisors (9517243).

42272645 is a wasteful number, since it uses less digits than its factorization.

42272645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 26880, while the sum is 32.

The square root of 42272645 is about 6501.7416897321. The cubic root of 42272645 is about 348.3532025224.

Adding to 42272645 its reverse (54627224), we get a palindrome (96899869).

The spelling of 42272645 in words is "forty-two million, two hundred seventy-two thousand, six hundred forty-five".