67256321 has 8 divisors (see below), whose sum is σ = 74196000. Its totient is φ = 60454240.

The previous prime is 67256291. The next prime is 67256323. The reversal of 67256321 is 12365276.

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

It is not a de Polignac number, because 67256321 - 2¹⁴ = 67239937 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 (67256323) 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, 33371 + ... + 35328.

It is an arithmetic number, because the mean of its divisors is an integer number (9274500).

It is a Proth number, since it is equal to 4105 ⋅ 2¹⁴ + 1 and 4105 < 2¹⁴.

Almost surely, 2^67256321 is an apocalyptic number.

It is an amenable number.

67256321 is a deficient number, since it is larger than the sum of its proper divisors (6939679).

67256321 is a wasteful number, since it uses less digits than its factorization.

67256321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68799.

The product of its digits is 15120, while the sum is 32.

The square root of 67256321 is about 8200.9951225446. The cubic root of 67256321 is about 406.6720912860.

The spelling of 67256321 in words is "sixty-seven million, two hundred fifty-six thousand, three hundred twenty-one".