646231242 has 16 divisors (see below), whose sum is σ = 1295552160. Its totient is φ = 214895472.

The previous prime is 646231237. The next prime is 646231291. The reversal of 646231242 is 242132646.

It is a super-2 number, since 2×646231242² = 835229636273725128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126013 + ... + 131040.

It is an arithmetic number, because the mean of its divisors is an integer number (80972010).

Almost surely, 2^646231242 is an apocalyptic number.

646231242 is an abundant number, since it is smaller than the sum of its proper divisors (649320918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646231242 is a wasteful number, since it uses less digits than its factorization.

646231242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257477.

The product of its digits is 13824, while the sum is 30.

The square root of 646231242 is about 25421.0786946581. The cubic root of 646231242 is about 864.5616819922.

Adding to 646231242 its reverse (242132646), we get a palindrome (888363888).

The spelling of 646231242 in words is "six hundred forty-six million, two hundred thirty-one thousand, two hundred forty-two".