71142773 has 16 divisors (see below), whose sum is σ = 82056240. Its totient is φ = 61095936.

The previous prime is 71142767. The next prime is 71142787. The reversal of 71142773 is 37724117.

It can be written as a sum of positive squares in 8 ways, for example, as 20775364 + 50367409 = 4558^2 + 7097^2 .

It is a cyclic number.

It is not a de Polignac number, because 71142773 - 2¹² = 71138677 is a prime.

It is a super-2 number, since 2×71142773² = 10122588300259058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71142763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17861 + ... + 21477.

It is an arithmetic number, because the mean of its divisors is an integer number (5128515).

Almost surely, 2^71142773 is an apocalyptic number.

It is an amenable number.

71142773 is a deficient number, since it is larger than the sum of its proper divisors (10913467).

71142773 is a wasteful number, since it uses less digits than its factorization.

71142773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736.

The product of its digits is 8232, while the sum is 32.

The square root of 71142773 is about 8434.6175372687. The cubic root of 71142773 is about 414.3591463685.

The spelling of 71142773 in words is "seventy-one million, one hundred forty-two thousand, seven hundred seventy-three".