775086421 has 4 divisors (see below), whose sum is σ = 776339200. Its totient is φ = 773833644.

The previous prime is 775086413. The next prime is 775086439. The reversal of 775086421 is 124680577.

775086421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124680577 = 7 ⋅17811511.

It is a cyclic number.

It is not a de Polignac number, because 775086421 - 2³ = 775086413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775086401) 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, 625461 + ... + 626698.

It is an arithmetic number, because the mean of its divisors is an integer number (194084800).

Almost surely, 2^775086421 is an apocalyptic number.

It is an amenable number.

775086421 is a deficient number, since it is larger than the sum of its proper divisors (1252779).

775086421 is a wasteful number, since it uses less digits than its factorization.

775086421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252778.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 775086421 is about 27840.3739378623. The cubic root of 775086421 is about 918.5794163623.

The spelling of 775086421 in words is "seven hundred seventy-five million, eighty-six thousand, four hundred twenty-one".