71397742 has 16 divisors (see below), whose sum is σ = 116962272. Its totient is φ = 32487840.

The previous prime is 71397737. The next prime is 71397757. The reversal of 71397742 is 24779317.

It is a junction number, because it is equal to n+sod(n) for n = 71397695 and 71397704.

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, 17493 + ... + 21184.

It is an arithmetic number, because the mean of its divisors is an integer number (7310142).

Almost surely, 2^71397742 is an apocalyptic number.

71397742 is a deficient number, since it is larger than the sum of its proper divisors (45564530).

71397742 is a wasteful number, since it uses less digits than its factorization.

71397742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38763.

The product of its digits is 74088, while the sum is 40.

The square root of 71397742 is about 8449.7184568481. The cubic root of 71397742 is about 414.8535642446.

The spelling of 71397742 in words is "seventy-one million, three hundred ninety-seven thousand, seven hundred forty-two".