641312242 has 8 divisors (see below), whose sum is σ = 985431132. Its totient is φ = 312835200.

The previous prime is 641312209. The next prime is 641312317. The reversal of 641312242 is 242213146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 641153041 + 159201 = 25321^2 + 399^2 .

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

It is a super-2 number, since 2×641312242² = 822562783478133128, which contains 22 as substring.

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, 3910359 + ... + 3910522.

Almost surely, 2^641312242 is an apocalyptic number.

641312242 is a deficient number, since it is larger than the sum of its proper divisors (344118890).

641312242 is a wasteful number, since it uses less digits than its factorization.

641312242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820924.

The product of its digits is 2304, while the sum is 25.

The square root of 641312242 is about 25324.1434603423. The cubic root of 641312242 is about 862.3624613564.

Adding to 641312242 its reverse (242213146), we get a palindrome (883525388).

The spelling of 641312242 in words is "six hundred forty-one million, three hundred twelve thousand, two hundred forty-two".