67207145 has 4 divisors (see below), whose sum is σ = 80648580. Its totient is φ = 53765712.

The previous prime is 67207121. The next prime is 67207157. The reversal of 67207145 is 54170276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32855824 + 34351321 = 5732^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 67207145 - 2⁸ = 67206889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6720710 + ... + 6720719.

It is an arithmetic number, because the mean of its divisors is an integer number (20162145).

Almost surely, 2^67207145 is an apocalyptic number.

It is an amenable number.

67207145 is a deficient number, since it is larger than the sum of its proper divisors (13441435).

67207145 is a wasteful number, since it uses less digits than its factorization.

67207145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13441434.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 67207145 is about 8197.9964015606. The cubic root of 67207145 is about 406.5729512470.

The spelling of 67207145 in words is "sixty-seven million, two hundred seven thousand, one hundred forty-five".