71505142 has 8 divisors (see below), whose sum is σ = 109539936. Its totient is φ = 34991832.

The previous prime is 71505139. The next prime is 71505143. The reversal of 71505142 is 24150517.

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

It is a super-2 number, since 2×71505142² = 10225970664880328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71505143) 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, 380253 + ... + 380440.

It is an arithmetic number, because the mean of its divisors is an integer number (13692492).

Almost surely, 2^71505142 is an apocalyptic number.

71505142 is a deficient number, since it is larger than the sum of its proper divisors (38034794).

71505142 is a wasteful number, since it uses less digits than its factorization.

71505142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760742.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 71505142 is about 8456.0713100115. The cubic root of 71505142 is about 415.0614744177.

Adding to 71505142 its reverse (24150517), we get a palindrome (95655659).

The spelling of 71505142 in words is "seventy-one million, five hundred five thousand, one hundred forty-two".