67345421 has 8 divisors (see below), whose sum is σ = 79119264. Its totient is φ = 56513520.

The previous prime is 67345409. The next prime is 67345429. The reversal of 67345421 is 12454376.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67345421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67345429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235331 + ... + 235616.

It is an arithmetic number, because the mean of its divisors is an integer number (9889908).

Almost surely, 2^67345421 is an apocalyptic number.

It is an amenable number.

67345421 is a deficient number, since it is larger than the sum of its proper divisors (11773843).

67345421 is a wasteful number, since it uses less digits than its factorization.

67345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470971.

The product of its digits is 20160, while the sum is 32.

The square root of 67345421 is about 8206.4255921808. The cubic root of 67345421 is about 406.8515960702.

Adding to 67345421 its reverse (12454376), we get a palindrome (79799797).

The spelling of 67345421 in words is "sixty-seven million, three hundred forty-five thousand, four hundred twenty-one".