68021542 has 16 divisors (see below), whose sum is σ = 104940864. Its totient is φ = 33048000.

The previous prime is 68021521. The next prime is 68021561. The reversal of 68021542 is 24512086.

It is a self number, because there is not a number n which added to its sum of digits gives 68021542.

It is a congruent number.

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, 20692 + ... + 23752.

It is an arithmetic number, because the mean of its divisors is an integer number (6558804).

Almost surely, 2^68021542 is an apocalyptic number.

68021542 is a deficient number, since it is larger than the sum of its proper divisors (36919322).

68021542 is a wasteful number, since it uses less digits than its factorization.

68021542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 68021542 is about 8247.5173234131. The cubic root of 68021542 is about 408.2086071187.

It can be divided in two parts, 680 and 21542, that added together give a palindrome (22222).

The spelling of 68021542 in words is "sixty-eight million, twenty-one thousand, five hundred forty-two".