78249241 has 4 divisors (see below), whose sum is σ = 89427712. Its totient is φ = 67070772.

The previous prime is 78249229. The next prime is 78249251. The reversal of 78249241 is 14294287.

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 78249241 - 2¹⁷ = 78118169 is a prime.

It is a super-2 number, since 2×78249241² = 12245887434152162, 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 78249241.

It is not an unprimeable number, because it can be changed into a prime (78249251) 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, 5589225 + ... + 5589238.

It is an arithmetic number, because the mean of its divisors is an integer number (22356928).

Almost surely, 2^78249241 is an apocalyptic number.

It is an amenable number.

78249241 is a deficient number, since it is larger than the sum of its proper divisors (11178471).

78249241 is a wasteful number, since it uses less digits than its factorization.

78249241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11178470.

The product of its digits is 32256, while the sum is 37.

The square root of 78249241 is about 8845.8601051565. The cubic root of 78249241 is about 427.7204790455.

The spelling of 78249241 in words is "seventy-eight million, two hundred forty-nine thousand, two hundred forty-one".