67525321 has 2 divisors, whose sum is σ = 67525322. Its totient is φ = 67525320.

The previous prime is 67525303. The next prime is 67525349. The reversal of 67525321 is 12352576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 18020025 = 7036^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 67525321 - 2⁷ = 67525193 is a prime.

It is a super-3 number, since 3×67525321³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (67525301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33762660 + 33762661.

It is an arithmetic number, because the mean of its divisors is an integer number (33762661).

Almost surely, 2^67525321 is an apocalyptic number.

It is an amenable number.

67525321 is a deficient number, since it is larger than the sum of its proper divisors (1).

67525321 is an equidigital number, since it uses as much as digits as its factorization.

67525321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 67525321 is about 8217.3792050751. The cubic root of 67525321 is about 407.2135485455.

Adding to 67525321 its reverse (12352576), we get a palindrome (79877897).

The spelling of 67525321 in words is "sixty-seven million, five hundred twenty-five thousand, three hundred twenty-one".