78571081 has 4 divisors (see below), whose sum is σ = 81105664. Its totient is φ = 76036500.

The previous prime is 78571057. The next prime is 78571123. The reversal of 78571081 is 18017587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78571081 - 2⁷ = 78570953 is a prime.

It is a super-2 number, since 2×78571081² = 12346829539017122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78571081.

It is not an unprimeable number, because it can be changed into a prime (78571021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267245 + ... + 1267306.

It is an arithmetic number, because the mean of its divisors is an integer number (20276416).

Almost surely, 2^78571081 is an apocalyptic number.

It is an amenable number.

78571081 is a deficient number, since it is larger than the sum of its proper divisors (2534583).

78571081 is a wasteful number, since it uses less digits than its factorization.

78571081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534582.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 78571081 is about 8864.0329985848. The cubic root of 78571081 is about 428.3060832774.

The spelling of 78571081 in words is "seventy-eight million, five hundred seventy-one thousand, eighty-one".