352246721 has 4 divisors (see below), whose sum is σ = 352373892. Its totient is φ = 352119552.

The previous prime is 352246663. The next prime is 352246729. The reversal of 352246721 is 127642253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127642253 = 29 ⋅4401457.

It can be written as a sum of positive squares in 2 ways, for example, as 77880625 + 274366096 = 8825^2 + 16564^2 .

It is a cyclic number.

It is not a de Polignac number, because 352246721 - 2²⁶ = 285137857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (352246729) 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, 59336 + ... + 65001.

It is an arithmetic number, because the mean of its divisors is an integer number (88093473).

Almost surely, 2^352246721 is an apocalyptic number.

It is an amenable number.

352246721 is a deficient number, since it is larger than the sum of its proper divisors (127171).

352246721 is a wasteful number, since it uses less digits than its factorization.

352246721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127170.

The product of its digits is 20160, while the sum is 32.

The square root of 352246721 is about 18768.2370242919. The cubic root of 352246721 is about 706.2345927565.

Adding to 352246721 its reverse (127642253), we get a palindrome (479888974).

The spelling of 352246721 in words is "three hundred fifty-two million, two hundred forty-six thousand, seven hundred twenty-one".