71851842 has 24 divisors (see below), whose sum is σ = 156820716. Its totient is φ = 23774976.

The previous prime is 71851837. The next prime is 71851859. The reversal of 71851842 is 24815817.

It can be written as a sum of positive squares in 2 ways, for example, as 65755881 + 6095961 = 8109^2 + 2469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71851797 and 71851806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12103 + ... + 17034.

Almost surely, 2^71851842 is an apocalyptic number.

71851842 is an abundant number, since it is smaller than the sum of its proper divisors (84968874).

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

71851842 is a wasteful number, since it uses less digits than its factorization.

71851842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29282 (or 29279 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 71851842 is about 8476.5465845473. The cubic root of 71851842 is about 415.7312158256.

The spelling of 71851842 in words is "seventy-one million, eight hundred fifty-one thousand, eight hundred forty-two".