42351281 has 8 divisors (see below), whose sum is σ = 50070720. Its totient is φ = 35049168.

The previous prime is 42351271. The next prime is 42351289. The reversal of 42351281 is 18215324.

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

It is a de Polignac number, because none of the positive numbers 2^k-42351281 is a prime.

It is a super-2 number, since 2×42351281² = 3587262004681922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42351281.

It is not an unprimeable number, because it can be changed into a prime (42351289) 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, 104111 + ... + 104516.

It is an arithmetic number, because the mean of its divisors is an integer number (6258840).

Almost surely, 2^42351281 is an apocalyptic number.

It is an amenable number.

42351281 is a deficient number, since it is larger than the sum of its proper divisors (7719439).

42351281 is a wasteful number, since it uses less digits than its factorization.

42351281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208663.

The product of its digits is 1920, while the sum is 26.

The square root of 42351281 is about 6507.7861827199. The cubic root of 42351281 is about 348.5690721021.

The spelling of 42351281 in words is "forty-two million, three hundred fifty-one thousand, two hundred eighty-one".