78781241 has 8 divisors (see below), whose sum is σ = 98220864. Its totient is φ = 61387920.

The previous prime is 78781237. The next prime is 78781243. The reversal of 78781241 is 14218787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78781241 - 2² = 78781237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78781195 and 78781204.

It is not an unprimeable number, because it can be changed into a prime (78781243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511490 + ... + 511643.

It is an arithmetic number, because the mean of its divisors is an integer number (12277608).

Almost surely, 2^78781241 is an apocalyptic number.

It is an amenable number.

78781241 is a deficient number, since it is larger than the sum of its proper divisors (19439623).

78781241 is a wasteful number, since it uses less digits than its factorization.

78781241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023151.

The product of its digits is 25088, while the sum is 38.

The square root of 78781241 is about 8875.8797310464. The cubic root of 78781241 is about 428.6876175080.

It can be divided in two parts, 7878 and 1241, that added together give a palindrome (9119).

The spelling of 78781241 in words is "seventy-eight million, seven hundred eighty-one thousand, two hundred forty-one".