42721122 has 8 divisors (see below), whose sum is σ = 85442256. Its totient is φ = 14240372.

The previous prime is 42721117. The next prime is 42721123. The reversal of 42721122 is 22112724.

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

42721122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (42721123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560088 + ... + 3560099.

It is an arithmetic number, because the mean of its divisors is an integer number (10680282).

Almost surely, 2^42721122 is an apocalyptic number.

42721122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42721122 is a wasteful number, since it uses less digits than its factorization.

42721122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120192.

The product of its digits is 448, while the sum is 21.

The square root of 42721122 is about 6536.1396863898. The cubic root of 42721122 is about 349.5807824303.

Adding to 42721122 its reverse (22112724), we get a palindrome (64833846).

The spelling of 42721122 in words is "forty-two million, seven hundred twenty-one thousand, one hundred twenty-two".