71550142 has 16 divisors (see below), whose sum is σ = 109440000. Its totient is φ = 35076600.

The previous prime is 71550137. The next prime is 71550169. The reversal of 71550142 is 24105517.

It is a congruent number.

It is an unprimeable number.

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, 22359 + ... + 25357.

It is an arithmetic number, because the mean of its divisors is an integer number (6840000).

Almost surely, 2^71550142 is an apocalyptic number.

71550142 is a deficient number, since it is larger than the sum of its proper divisors (37889858).

71550142 is a wasteful number, since it uses less digits than its factorization.

71550142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 71550142 is about 8458.7317016205. The cubic root of 71550142 is about 415.1485257312.

Adding to 71550142 its reverse (24105517), we get a palindrome (95655659).

The spelling of 71550142 in words is "seventy-one million, five hundred fifty thousand, one hundred forty-two".