78122041 has 4 divisors (see below), whose sum is σ = 78646500. Its totient is φ = 77597584.

The previous prime is 78122039. The next prime is 78122047. The reversal of 78122041 is 14022187.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46717225 + 31404816 = 6835^2 + 5604^2 .

It is a cyclic number.

It is not a de Polignac number, because 78122041 - 2¹ = 78122039 is a prime.

It is a super-2 number, since 2×78122041² = 12206106580011362, 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 = 78121997 and 78122015.

It is not an unprimeable number, because it can be changed into a prime (78122047) 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, 262006 + ... + 262303.

It is an arithmetic number, because the mean of its divisors is an integer number (19661625).

Almost surely, 2^78122041 is an apocalyptic number.

It is an amenable number.

78122041 is a deficient number, since it is larger than the sum of its proper divisors (524459).

78122041 is a wasteful number, since it uses less digits than its factorization.

78122041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524458.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 78122041 is about 8838.6673769296. The cubic root of 78122041 is about 427.4885894610.

It can be divided in two parts, 781 and 22041, that added together give a palindrome (22822).

The spelling of 78122041 in words is "seventy-eight million, one hundred twenty-two thousand, forty-one".