67436121 has 4 divisors (see below), whose sum is σ = 89914832. Its totient is φ = 44957412.

The previous prime is 67436113. The next prime is 67436123. The reversal of 67436121 is 12163476.

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 not a de Polignac number, because 67436121 - 2³ = 67436113 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67436123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11239351 + ... + 11239356.

It is an arithmetic number, because the mean of its divisors is an integer number (22478708).

Almost surely, 2^67436121 is an apocalyptic number.

It is an amenable number.

67436121 is a deficient number, since it is larger than the sum of its proper divisors (22478711).

67436121 is a wasteful number, since it uses less digits than its factorization.

67436121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22478710.

The product of its digits is 6048, while the sum is 30.

The square root of 67436121 is about 8211.9498902514. The cubic root of 67436121 is about 407.0341617416.

Adding to 67436121 its reverse (12163476), we get a palindrome (79599597).

The spelling of 67436121 in words is "sixty-seven million, four hundred thirty-six thousand, one hundred twenty-one".