705571121 has 4 divisors (see below), whose sum is σ = 708499044. Its totient is φ = 702643200.

The previous prime is 705571081. The next prime is 705571151. The reversal of 705571121 is 121175507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121175507 = 17 ⋅7127971.

It can be written as a sum of positive squares in 2 ways, for example, as 339996721 + 365574400 = 18439^2 + 19120^2 .

It is a cyclic number.

It is not a de Polignac number, because 705571121 - 2²⁶ = 638462257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705571151) 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, 1463600 + ... + 1464081.

It is an arithmetic number, because the mean of its divisors is an integer number (177124761).

Almost surely, 2^705571121 is an apocalyptic number.

It is an amenable number.

705571121 is a deficient number, since it is larger than the sum of its proper divisors (2927923).

705571121 is a wasteful number, since it uses less digits than its factorization.

705571121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927922.

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 705571121 is about 26562.5887480870. The cubic root of 705571121 is about 890.2533138305.

The spelling of 705571121 in words is "seven hundred five million, five hundred seventy-one thousand, one hundred twenty-one".