68121472 has 16 divisors (see below), whose sum is σ = 135711000. Its totient is φ = 34060672.

The previous prime is 68121467. The next prime is 68121497. The reversal of 68121472 is 27412186.

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 265972 + ... + 266227.

Almost surely, 2^68121472 is an apocalyptic number.

It is an amenable number.

68121472 is a deficient number, since it is larger than the sum of its proper divisors (67589528).

68121472 is an equidigital number, since it uses as much as digits as its factorization.

68121472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532213 (or 532201 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 68121472 is about 8253.5732867650. The cubic root of 68121472 is about 408.4084081685.

The spelling of 68121472 in words is "sixty-eight million, one hundred twenty-one thousand, four hundred seventy-two".