71142897 has 64 divisors (see below), whose sum is σ = 120627200. Its totient is φ = 36391680.

The previous prime is 71142889. The next prime is 71142901. The reversal of 71142897 is 79824117.

It is not a de Polignac number, because 71142897 - 2³ = 71142889 is a prime.

It is a super-2 number, since 2×71142897² = 10122623587105218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71142857) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 900504 + ... + 900582.

It is an arithmetic number, because the mean of its divisors is an integer number (1884800).

Almost surely, 2^71142897 is an apocalyptic number.

It is an amenable number.

71142897 is a deficient number, since it is larger than the sum of its proper divisors (49484303).

71142897 is a wasteful number, since it uses less digits than its factorization.

71142897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its digits is 28224, while the sum is 39.

The square root of 71142897 is about 8434.6248879248. The cubic root of 71142897 is about 414.3593871074.

It can be divided in two parts, 7114 and 2897, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 71142897 in words is "seventy-one million, one hundred forty-two thousand, eight hundred ninety-seven".