321040634 has 4 divisors (see below), whose sum is σ = 481560954. Its totient is φ = 160520316.

The previous prime is 321040613. The next prime is 321040651. The reversal of 321040634 is 436040123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 259371025 + 61669609 = 16105^2 + 7853^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80260157 + ... + 80260160.

Almost surely, 2^321040634 is an apocalyptic number.

321040634 is a deficient number, since it is larger than the sum of its proper divisors (160520320).

321040634 is a wasteful number, since it uses less digits than its factorization.

321040634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160520319.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 321040634 is about 17917.6068156437. The cubic root of 321040634 is about 684.7310176974.

Adding to 321040634 its reverse (436040123), we get a palindrome (757080757).

The spelling of 321040634 in words is "three hundred twenty-one million, forty thousand, six hundred thirty-four".