71342420 has 12 divisors (see below), whose sum is σ = 149819124. Its totient is φ = 28536960.

The previous prime is 71342413. The next prime is 71342423. The reversal of 71342420 is 2424317.

It can be written as a sum of positive squares in 2 ways, for example, as 7150276 + 64192144 = 2674^2 + 8012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71342423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783541 + ... + 1783580.

It is an arithmetic number, because the mean of its divisors is an integer number (12484927).

Almost surely, 2^71342420 is an apocalyptic number.

It is an amenable number.

71342420 is an abundant number, since it is smaller than the sum of its proper divisors (78476704).

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

71342420 is a wasteful number, since it uses less digits than its factorization.

71342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567130 (or 3567128 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 71342420 is about 8446.4442222748. Note that the first 3 decimals coincide. The cubic root of 71342420 is about 414.7463878434.

Adding to 71342420 its reverse (2424317), we get a palindrome (73766737).

The spelling of 71342420 in words is "seventy-one million, three hundred forty-two thousand, four hundred twenty".