342788721 has 8 divisors (see below), whose sum is σ = 498601824. Its totient is φ = 207750720.

The previous prime is 342788717. The next prime is 342788723. The reversal of 342788721 is 127887243.

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

It is not a de Polignac number, because 342788721 - 2² = 342788717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (342788723) 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, 5193736 + ... + 5193801.

It is an arithmetic number, because the mean of its divisors is an integer number (62325228).

Almost surely, 2^342788721 is an apocalyptic number.

It is an amenable number.

342788721 is a deficient number, since it is larger than the sum of its proper divisors (155813103).

342788721 is a wasteful number, since it uses less digits than its factorization.

342788721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10387551.

The product of its digits is 150528, while the sum is 42.

The square root of 342788721 is about 18514.5543019539. The cubic root of 342788721 is about 699.8562432683.

It can be divided in two parts, 3 and 42788721, that added together give a palindrome (42788724).

The spelling of 342788721 in words is "three hundred forty-two million, seven hundred eighty-eight thousand, seven hundred twenty-one".