77155241 has 4 divisors (see below), whose sum is σ = 77175300. Its totient is φ = 77135184.

The previous prime is 77155237. The next prime is 77155259. The reversal of 77155241 is 14255177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14255177 = 331 ⋅43067.

It can be written as a sum of positive squares in 2 ways, for example, as 39639616 + 37515625 = 6296^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 77155241 - 2² = 77155237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77155198 and 77155207.

It is not an unprimeable number, because it can be changed into a prime (77155261) 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 3 ways as a sum of consecutive naturals, for example, 2246 + ... + 12623.

It is an arithmetic number, because the mean of its divisors is an integer number (19293825).

Almost surely, 2^77155241 is an apocalyptic number.

It is an amenable number.

77155241 is a deficient number, since it is larger than the sum of its proper divisors (20059).

77155241 is a wasteful number, since it uses less digits than its factorization.

77155241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20058.

The product of its digits is 9800, while the sum is 32.

The square root of 77155241 is about 8783.8056103263. The cubic root of 77155241 is about 425.7178015232.

The spelling of 77155241 in words is "seventy-seven million, one hundred fifty-five thousand, two hundred forty-one".