67345121 has 4 divisors (see below), whose sum is σ = 68156592. Its totient is φ = 66533652.

The previous prime is 67345111. The next prime is 67345123. The reversal of 67345121 is 12154376.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67345121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67345123) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 405611 + ... + 405776.

It is an arithmetic number, because the mean of its divisors is an integer number (17039148).

Almost surely, 2^67345121 is an apocalyptic number.

It is an amenable number.

67345121 is a deficient number, since it is larger than the sum of its proper divisors (811471).

67345121 is an equidigital number, since it uses as much as digits as its factorization.

67345121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811470.

The product of its digits is 5040, while the sum is 29.

The square root of 67345121 is about 8206.4073138006. The cubic root of 67345121 is about 406.8509919427.

Adding to 67345121 its reverse (12154376), we get a palindrome (79499497).

The spelling of 67345121 in words is "sixty-seven million, three hundred forty-five thousand, one hundred twenty-one".