67042247 has 4 divisors (see below), whose sum is σ = 67986576. Its totient is φ = 66097920.

The previous prime is 67042211. The next prime is 67042249. The reversal of 67042247 is 74224076.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67042247 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 (67042249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472058 + ... + 472199.

It is an arithmetic number, because the mean of its divisors is an integer number (16996644).

Almost surely, 2^67042247 is an apocalyptic number.

67042247 is a deficient number, since it is larger than the sum of its proper divisors (944329).

67042247 is an equidigital number, since it uses as much as digits as its factorization.

67042247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944328.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 67042247 is about 8187.9330114504. The cubic root of 67042247 is about 406.2401593829.

The spelling of 67042247 in words is "sixty-seven million, forty-two thousand, two hundred forty-seven".