265442891 has 8 divisors (see below), whose sum is σ = 303487200. Its totient is φ = 227429568.

The previous prime is 265442873. The next prime is 265442927. The reversal of 265442891 is 198244562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 265442891 - 2²² = 261248587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265442851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15125 + ... + 27561.

It is an arithmetic number, because the mean of its divisors is an integer number (37935900).

Almost surely, 2^265442891 is an apocalyptic number.

265442891 is a deficient number, since it is larger than the sum of its proper divisors (38044309).

265442891 is a wasteful number, since it uses less digits than its factorization.

265442891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15493.

The product of its digits is 138240, while the sum is 41.

The square root of 265442891 is about 16292.4182060245. The cubic root of 265442891 is about 642.6734610153.

The spelling of 265442891 in words is "two hundred sixty-five million, four hundred forty-two thousand, eight hundred ninety-one".