78171041 has 4 divisors (see below), whose sum is σ = 84184212. Its totient is φ = 72157872.

The previous prime is 78171031. The next prime is 78171091. The reversal of 78171041 is 14017187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14017187 = 1051 ⋅13337.

It can be written as a sum of positive squares in 2 ways, for example, as 40704400 + 37466641 = 6380^2 + 6121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78171041 is a prime.

It is a super-2 number, since 2×78171041² = 12221423302047362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78170995 and 78171013.

It is not an unprimeable number, because it can be changed into a prime (78171031) 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, 3006566 + ... + 3006591.

It is an arithmetic number, because the mean of its divisors is an integer number (21046053).

Almost surely, 2^78171041 is an apocalyptic number.

It is an amenable number.

78171041 is a deficient number, since it is larger than the sum of its proper divisors (6013171).

78171041 is a wasteful number, since it uses less digits than its factorization.

78171041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013170.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 78171041 is about 8841.4388534899. The cubic root of 78171041 is about 427.5779477806.

The spelling of 78171041 in words is "seventy-eight million, one hundred seventy-one thousand, forty-one".