265171057 has 4 divisors (see below), whose sum is σ = 265431796. Its totient is φ = 264910320.

The previous prime is 265171003. The next prime is 265171091. The reversal of 265171057 is 750171562.

It is a happy number.

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 155151936 + 110019121 = 12456^2 + 10489^2 .

It is a cyclic number.

It is not a de Polignac number, because 265171057 - 2⁷ = 265170929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265171097) 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, 128838 + ... + 130879.

It is an arithmetic number, because the mean of its divisors is an integer number (66357949).

Almost surely, 2^265171057 is an apocalyptic number.

It is an amenable number.

265171057 is a deficient number, since it is larger than the sum of its proper divisors (260739).

265171057 is a wasteful number, since it uses less digits than its factorization.

265171057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260738.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 265171057 is about 16284.0737225057. The cubic root of 265171057 is about 642.4540036818.

The spelling of 265171057 in words is "two hundred sixty-five million, one hundred seventy-one thousand, fifty-seven".