42621371 has 16 divisors (see below), whose sum is σ = 47371968. Its totient is φ = 38102400.

The previous prime is 42621349. The next prime is 42621379. The reversal of 42621371 is 17312624.

It is a cyclic number.

It is not a de Polignac number, because 42621371 - 2⁶ = 42621307 is a prime.

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 42621371.

It is not an unprimeable number, because it can be changed into a prime (42621379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55925 + ... + 56681.

It is an arithmetic number, because the mean of its divisors is an integer number (2960748).

Almost surely, 2^42621371 is an apocalyptic number.

42621371 is a deficient number, since it is larger than the sum of its proper divisors (4750597).

42621371 is a wasteful number, since it uses less digits than its factorization.

42621371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 2016, while the sum is 26.

The square root of 42621371 is about 6528.5044995006. The cubic root of 42621371 is about 349.3084877060.

Adding to 42621371 its reverse (17312624), we get a palindrome (59933995).

The spelling of 42621371 in words is "forty-two million, six hundred twenty-one thousand, three hundred seventy-one".