71234120 has 32 divisors (see below), whose sum is σ = 163305720. Its totient is φ = 27955200.

The previous prime is 71234117. The next prime is 71234123. The reversal of 71234120 is 2143217.

It is an interprime number because it is at equal distance from previous prime (71234117) and next prime (71234123).

It can be written as a sum of positive squares in 4 ways, for example, as 41705764 + 29528356 = 6458^2 + 5434^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 71234092 and 71234101.

It is not an unprimeable number, because it can be changed into a prime (71234123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14681 + ... + 18920.

Almost surely, 2^71234120 is an apocalyptic number.

It is an amenable number.

71234120 is an abundant number, since it is smaller than the sum of its proper divisors (92071600).

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

71234120 is a wasteful number, since it uses less digits than its factorization.

71234120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33665 (or 33661 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 71234120 is about 8440.0308056310. The cubic root of 71234120 is about 414.5364156115.

Adding to 71234120 its reverse (2143217), we get a palindrome (73377337).

The spelling of 71234120 in words is "seventy-one million, two hundred thirty-four thousand, one hundred twenty".