71745442 has 8 divisors (see below), whose sum is σ = 110526876. Its totient is φ = 34903152.

The previous prime is 71745433. The next prime is 71745461. The reversal of 71745442 is 24454717.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71419401 + 326041 = 8451^2 + 571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 71745398 and 71745407.

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, 484693 + ... + 484840.

Almost surely, 2^71745442 is an apocalyptic number.

71745442 is a deficient number, since it is larger than the sum of its proper divisors (38781434).

71745442 is a wasteful number, since it uses less digits than its factorization.

71745442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969572.

The product of its digits is 31360, while the sum is 34.

The square root of 71745442 is about 8470.2681185426. The cubic root of 71745442 is about 415.5259060646.

The spelling of 71745442 in words is "seventy-one million, seven hundred forty-five thousand, four hundred forty-two".