67121536 has 16 divisors (see below), whose sum is σ = 133718940. Its totient is φ = 33560704.

The previous prime is 67121531. The next prime is 67121539. The reversal of 67121536 is 63512176.

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 junction number, because it is equal to n+sod(n) for n = 67121498 and 67121507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67121531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262066 + ... + 262321.

Almost surely, 2^67121536 is an apocalyptic number.

It is an amenable number.

67121536 is a deficient number, since it is larger than the sum of its proper divisors (66597404).

67121536 is an equidigital number, since it uses as much as digits as its factorization.

67121536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524401 (or 524389 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 67121536 is about 8192.7734009919. The cubic root of 67121536 is about 406.4002459337.

The spelling of 67121536 in words is "sixty-seven million, one hundred twenty-one thousand, five hundred thirty-six".