442321252 has 12 divisors (see below), whose sum is σ = 788667516. Its totient is φ = 216987680.

The previous prime is 442321241. The next prime is 442321279. The reversal of 442321252 is 252123244.

It can be written as a sum of positive squares in 2 ways, for example, as 346555456 + 95765796 = 18616^2 + 9786^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042999 + ... + 1043422.

It is an arithmetic number, because the mean of its divisors is an integer number (65722293).

Almost surely, 2^442321252 is an apocalyptic number.

It is an amenable number.

442321252 is a deficient number, since it is larger than the sum of its proper divisors (346346264).

442321252 is a wasteful number, since it uses less digits than its factorization.

442321252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086478 (or 2086476 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 442321252 is about 21031.4348535710. The cubic root of 442321252 is about 761.9256637850.

Adding to 442321252 its reverse (252123244), we get a palindrome (694444496).

The spelling of 442321252 in words is "four hundred forty-two million, three hundred twenty-one thousand, two hundred fifty-two".