641242542 has 16 divisors (see below), whose sum is σ = 1313765712. Its totient is φ = 208534080.

The previous prime is 641242541. The next prime is 641242543. The reversal of 641242542 is 245242146.

641242542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (641242541) and next prime (641242543).

It is a super-2 number, since 2×641242542² = 822383995341243528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641242541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303093 + ... + 1303584.

It is an arithmetic number, because the mean of its divisors is an integer number (82110357).

Almost surely, 2^641242542 is an apocalyptic number.

641242542 is an abundant number, since it is smaller than the sum of its proper divisors (672523170).

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

641242542 is a wasteful number, since it uses less digits than its factorization.

641242542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606723.

The product of its digits is 15360, while the sum is 30.

The square root of 641242542 is about 25322.7672658420. The cubic root of 641242542 is about 862.3312187274.

Adding to 641242542 its reverse (245242146), we get a palindrome (886484688).

It can be divided in two parts, 64124 and 2542, that added together give a palindrome (66666).

The spelling of 641242542 in words is "six hundred forty-one million, two hundred forty-two thousand, five hundred forty-two".