71142742 has 16 divisors (see below), whose sum is σ = 120430800. Its totient is φ = 31222240.

The previous prime is 71142727. The next prime is 71142751. The reversal of 71142742 is 24724117.

It is a super-2 number, since 2×71142742² = 10122579478557128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71142742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55117 + ... + 56392.

It is an arithmetic number, because the mean of its divisors is an integer number (7526925).

Almost surely, 2^71142742 is an apocalyptic number.

71142742 is a deficient number, since it is larger than the sum of its proper divisors (49288058).

71142742 is a wasteful number, since it uses less digits than its factorization.

71142742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111551.

The product of its digits is 3136, while the sum is 28.

The square root of 71142742 is about 8434.6156996036. The cubic root of 71142742 is about 414.3590861837.

Adding to 71142742 its reverse (24724117), we get a palindrome (95866859).

The spelling of 71142742 in words is "seventy-one million, one hundred forty-two thousand, seven hundred forty-two".