321025042 has 16 divisors (see below), whose sum is σ = 549084312. Its totient is φ = 139449600.

The previous prime is 321025037. The next prime is 321025051. The reversal of 321025042 is 240520123.

It can be written as a sum of positive squares in 4 ways, for example, as 172160641 + 148864401 = 13121^2 + 12201^2 .

It is a super-2 number, since 2×321025042² = 206114155182203528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362709 + ... + 363592.

Almost surely, 2^321025042 is an apocalyptic number.

321025042 is a deficient number, since it is larger than the sum of its proper divisors (228059270).

321025042 is a wasteful number, since it uses less digits than its factorization.

321025042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726333.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 321025042 is about 17917.1717076106. The cubic root of 321025042 is about 684.7199323936.

Adding to 321025042 its reverse (240520123), we get a palindrome (561545165).

The spelling of 321025042 in words is "three hundred twenty-one million, twenty-five thousand, forty-two".