67385421 has 6 divisors (see below), whose sum is σ = 97334510. Its totient is φ = 44923608.

The previous prime is 67385387. The next prime is 67385431. The reversal of 67385421 is 12458376.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 3944196 = 7965^2 + 1986^2 .

It is not a de Polignac number, because 67385421 - 2¹⁴ = 67369037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67385431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3743626 + ... + 3743643.

Almost surely, 2^67385421 is an apocalyptic number.

It is an amenable number.

67385421 is a deficient number, since it is larger than the sum of its proper divisors (29949089).

67385421 is a wasteful number, since it uses less digits than its factorization.

67385421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487275 (or 7487272 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 67385421 is about 8208.8623450512. The cubic root of 67385421 is about 406.9321303399.

The spelling of 67385421 in words is "sixty-seven million, three hundred eighty-five thousand, four hundred twenty-one".