775134621 has 12 divisors (see below), whose sum is σ = 1178567520. Its totient is φ = 489558600.

The previous prime is 775134617. The next prime is 775134623. The reversal of 775134621 is 126431577.

It is a happy number.

It is not a de Polignac number, because 775134621 - 2² = 775134617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775134623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2266305 + ... + 2266646.

It is an arithmetic number, because the mean of its divisors is an integer number (98213960).

Almost surely, 2^775134621 is an apocalyptic number.

It is an amenable number.

775134621 is a deficient number, since it is larger than the sum of its proper divisors (403432899).

775134621 is a wasteful number, since it uses less digits than its factorization.

775134621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532976 (or 4532973 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 775134621 is about 27841.2395736971. The cubic root of 775134621 is about 918.5984570821.

The spelling of 775134621 in words is "seven hundred seventy-five million, one hundred thirty-four thousand, six hundred twenty-one".