775575121 has 4 divisors (see below), whose sum is σ = 776561392. Its totient is φ = 774588852.

The previous prime is 775575113. The next prime is 775575131. The reversal of 775575121 is 121575577.

775575121 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.

It is a cyclic number.

It is not a de Polignac number, because 775575121 - 2³ = 775575113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775575131) 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, 491955 + ... + 493528.

It is an arithmetic number, because the mean of its divisors is an integer number (194140348).

Almost surely, 2^775575121 is an apocalyptic number.

It is an amenable number.

775575121 is a deficient number, since it is larger than the sum of its proper divisors (986271).

775575121 is an equidigital number, since it uses as much as digits as its factorization.

775575121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986270.

The product of its digits is 85750, while the sum is 40.

The square root of 775575121 is about 27849.1493765968. The cubic root of 775575121 is about 918.7724337404.

The spelling of 775575121 in words is "seven hundred seventy-five million, five hundred seventy-five thousand, one hundred twenty-one".