78241149 has 12 divisors (see below), whose sum is σ = 129160096. Its totient is φ = 44709192.

The previous prime is 78241109. The next prime is 78241151. The reversal of 78241149 is 94114287.

It is not a de Polignac number, because 78241149 - 2⁸ = 78240893 is a prime.

It is a super-2 number, since 2×78241149² = 12243354793680402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78241109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620899 + ... + 621024.

Almost surely, 2^78241149 is an apocalyptic number.

It is an amenable number.

78241149 is a deficient number, since it is larger than the sum of its proper divisors (50918947).

78241149 is a wasteful number, since it uses less digits than its factorization.

78241149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241936 (or 1241933 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 78241149 is about 8845.4027042300. The cubic root of 78241149 is about 427.7057345641.

The spelling of 78241149 in words is "seventy-eight million, two hundred forty-one thousand, one hundred forty-nine".