71071420 has 48 divisors (see below), whose sum is σ = 171154368. Its totient is φ = 24284160.

The previous prime is 71071397. The next prime is 71071439. The reversal of 71071420 is 2417017.

It is a super-2 number, since 2×71071420² = 10102293481632800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71071391 and 71071400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51540 + ... + 52900.

It is an arithmetic number, because the mean of its divisors is an integer number (3565716).

Almost surely, 2^71071420 is an apocalyptic number.

71071420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71071420 is an abundant number, since it is smaller than the sum of its proper divisors (100082948).

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

71071420 is a wasteful number, since it uses less digits than its factorization.

71071420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 71071420 is about 8430.3867052467. The cubic root of 71071420 is about 414.2205721708.

Adding to 71071420 its reverse (2417017), we get a palindrome (73488437).

The spelling of 71071420 in words is "seventy-one million, seventy-one thousand, four hundred twenty".