71442252 has 36 divisors (see below), whose sum is σ = 206389456. Its totient is φ = 20412000.

The previous prime is 71442229. The next prime is 71442257. The reversal of 71442252 is 25224417.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×71442252³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (71442257) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 141499 + ... + 142002.

Almost surely, 2^71442252 is an apocalyptic number.

It is an amenable number.

71442252 is an abundant number, since it is smaller than the sum of its proper divisors (134947204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71442252 is a wasteful number, since it uses less digits than its factorization.

71442252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283518 (or 283513 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 71442252 is about 8452.3518620559. The cubic root of 71442252 is about 414.9397541615.

Adding to 71442252 its reverse (25224417), we get a palindrome (96666669).

The spelling of 71442252 in words is "seventy-one million, four hundred forty-two thousand, two hundred fifty-two".