78572241 has 16 divisors (see below), whose sum is σ = 126985920. Its totient is φ = 47619360.

The previous prime is 78572213. The next prime is 78572257. The reversal of 78572241 is 14227587.

It is not a de Polignac number, because 78572241 - 2⁹ = 78571729 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78572196 and 78572205.

It is not an unprimeable number, because it can be changed into a prime (78572261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131980 + ... + 132573.

It is an arithmetic number, because the mean of its divisors is an integer number (7936620).

Almost surely, 2^78572241 is an apocalyptic number.

It is an amenable number.

78572241 is a deficient number, since it is larger than the sum of its proper divisors (48413679).

78572241 is a wasteful number, since it uses less digits than its factorization.

78572241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264573 (or 264567 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 78572241 is about 8864.0984313127. The cubic root of 78572241 is about 428.3081910614.

The spelling of 78572241 in words is "seventy-eight million, five hundred seventy-two thousand, two hundred forty-one".