71667242 has 4 divisors (see below), whose sum is σ = 107500866. Its totient is φ = 35833620.

The previous prime is 71667217. The next prime is 71667293. The reversal of 71667242 is 24276617.

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

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 30591961 = 6409^2 + 5531^2 .

It is an unprimeable number.

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, 17916809 + ... + 17916812.

Almost surely, 2^71667242 is an apocalyptic number.

71667242 is a deficient number, since it is larger than the sum of its proper divisors (35833624).

71667242 is a wasteful number, since it uses less digits than its factorization.

71667242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35833623.

The product of its digits is 28224, while the sum is 35.

The square root of 71667242 is about 8465.6507133238. The cubic root of 71667242 is about 415.3748816561.

The spelling of 71667242 in words is "seventy-one million, six hundred sixty-seven thousand, two hundred forty-two".