42511321 has 8 divisors (see below), whose sum is σ = 43243200. Its totient is φ = 41783280.

The previous prime is 42511309. The next prime is 42511333. The reversal of 42511321 is 12311524.

42511321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42511309) and next prime (42511333).

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 42511321 - 2¹³ = 42503129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42511121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29035 + ... + 30463.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^42511321 is an apocalyptic number.

It is an amenable number.

42511321 is a deficient number, since it is larger than the sum of its proper divisors (731879).

42511321 is a wasteful number, since it uses less digits than its factorization.

42511321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919.

The product of its digits is 240, while the sum is 19.

The square root of 42511321 is about 6520.0706284518. The cubic root of 42511321 is about 349.0075859797.

Adding to 42511321 its reverse (12311524), we get a palindrome (54822845).

The spelling of 42511321 in words is "forty-two million, five hundred eleven thousand, three hundred twenty-one".