67242729 has 16 divisors (see below), whose sum is σ = 94702400. Its totient is φ = 42322176.

The previous prime is 67242719. The next prime is 67242739. The reversal of 67242729 is 92724276.

It is an interprime number because it is at equal distance from previous prime (67242719) and next prime (67242739).

It is not a de Polignac number, because 67242729 - 2¹¹ = 67240681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67242719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15957 + ... + 19725.

It is an arithmetic number, because the mean of its divisors is an integer number (5918900).

Almost surely, 2^67242729 is an apocalyptic number.

It is an amenable number.

67242729 is a deficient number, since it is larger than the sum of its proper divisors (27459671).

67242729 is a wasteful number, since it uses less digits than its factorization.

67242729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104.

The product of its digits is 84672, while the sum is 39.

The square root of 67242729 is about 8200.1664007507. The cubic root of 67242729 is about 406.6446943099.

It can be divided in two parts, 6724 and 2729, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 67242729 in words is "sixty-seven million, two hundred forty-two thousand, seven hundred twenty-nine".