67100421 has 8 divisors (see below), whose sum is σ = 89597664. Its totient is φ = 44668400.

The previous prime is 67100389. The next prime is 67100447. The reversal of 67100421 is 12400176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67100421 - 2⁵ = 67100389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67101421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13851 + ... + 18056.

It is an arithmetic number, because the mean of its divisors is an integer number (11199708).

Almost surely, 2^67100421 is an apocalyptic number.

It is an amenable number.

67100421 is a deficient number, since it is larger than the sum of its proper divisors (22497243).

67100421 is a wasteful number, since it uses less digits than its factorization.

67100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32611.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 67100421 is about 8191.4846639666. The cubic root of 67100421 is about 406.3576265218.

Adding to 67100421 its reverse (12400176), we get a palindrome (79500597).

The spelling of 67100421 in words is "sixty-seven million, one hundred thousand, four hundred twenty-one".