771478241 has 4 divisors (see below), whose sum is σ = 816859332. Its totient is φ = 726097152.

The previous prime is 771478237. The next prime is 771478247. The reversal of 771478241 is 142874177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 411237841 + 360240400 = 20279^2 + 18980^2 .

It is a cyclic number.

It is not a de Polignac number, because 771478241 - 2² = 771478237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (771478247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22690520 + ... + 22690553.

It is an arithmetic number, because the mean of its divisors is an integer number (204214833).

Almost surely, 2^771478241 is an apocalyptic number.

It is an amenable number.

771478241 is a deficient number, since it is larger than the sum of its proper divisors (45381091).

771478241 is a wasteful number, since it uses less digits than its factorization.

771478241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45381090.

The product of its digits is 87808, while the sum is 41.

The square root of 771478241 is about 27775.4971332648. The cubic root of 771478241 is about 917.1518094131.

The spelling of 771478241 in words is "seven hundred seventy-one million, four hundred seventy-eight thousand, two hundred forty-one".