71240130 has 48 divisors (see below), whose sum is σ = 199475640. Its totient is φ = 17535744.

The previous prime is 71240129. The next prime is 71240161. The reversal of 71240130 is 3104217.

It can be written as a sum of positive squares in 4 ways, for example, as 24413481 + 46826649 = 4941^2 + 6843^2 .

It is a super-2 number, since 2×71240130² = 10150312244833800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29275 + ... + 31614.

Almost surely, 2^71240130 is an apocalyptic number.

71240130 is an abundant number, since it is smaller than the sum of its proper divisors (128235510).

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

71240130 is a wasteful number, since it uses less digits than its factorization.

71240130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60915 (or 60912 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71240130 is about 8440.3868394760. The cubic root of 71240130 is about 414.5480733854.

Adding to 71240130 its reverse (3104217), we get a palindrome (74344347).

The spelling of 71240130 in words is "seventy-one million, two hundred forty thousand, one hundred thirty".