265196921 has 16 divisors (see below), whose sum is σ = 295692288. Its totient is φ = 235818000.

The previous prime is 265196903. The next prime is 265196929. The reversal of 265196921 is 129691562.

It is not a de Polignac number, because 265196921 - 2¹⁰ = 265195897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265196929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110096 + ... + 112478.

It is an arithmetic number, because the mean of its divisors is an integer number (18480768).

Almost surely, 2^265196921 is an apocalyptic number.

It is an amenable number.

265196921 is a deficient number, since it is larger than the sum of its proper divisors (30495367).

265196921 is a wasteful number, since it uses less digits than its factorization.

265196921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612.

The product of its digits is 58320, while the sum is 41.

The square root of 265196921 is about 16284.8678533171. The cubic root of 265196921 is about 642.4748906901.

The spelling of 265196921 in words is "two hundred sixty-five million, one hundred ninety-six thousand, nine hundred twenty-one".