71142150 has 72 divisors (see below), whose sum is σ = 180892440. Its totient is φ = 18501120.

The previous prime is 71142143. The next prime is 71142193. The reversal of 71142150 is 5124117.

It is a happy number.

It is a super-2 number, since 2×71142150² = 10122411013245000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 799306 + ... + 799394.

It is an arithmetic number, because the mean of its divisors is an integer number (2512395).

Almost surely, 2^71142150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71142150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90446220).

71142150 is an abundant number, since it is smaller than the sum of its proper divisors (109750290).

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

71142150 is a wasteful number, since it uses less digits than its factorization.

71142150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 71142150 is about 8434.5806060527. The cubic root of 71142150 is about 414.3579368453.

Adding to 71142150 its reverse (5124117), we get a palindrome (76266267).

The spelling of 71142150 in words is "seventy-one million, one hundred forty-two thousand, one hundred fifty".