67712145 has 16 divisors (see below), whose sum is σ = 108449280. Its totient is φ = 36076544.

The previous prime is 67712131. The next prime is 67712159. The reversal of 67712145 is 54121776.

It is an interprime number because it is at equal distance from previous prime (67712131) and next prime (67712159).

It is a cyclic number.

It is not a de Polignac number, because 67712145 - 2⁷ = 67712017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20017 + ... + 23153.

It is an arithmetic number, because the mean of its divisors is an integer number (6778080).

Almost surely, 2^67712145 is an apocalyptic number.

It is an amenable number.

67712145 is a deficient number, since it is larger than the sum of its proper divisors (40737135).

67712145 is a wasteful number, since it uses less digits than its factorization.

67712145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4584.

The product of its digits is 11760, while the sum is 33.

The square root of 67712145 is about 8228.7389677884. The cubic root of 67712145 is about 407.5887520439.

The spelling of 67712145 in words is "sixty-seven million, seven hundred twelve thousand, one hundred forty-five".