265857401 has 4 divisors (see below), whose sum is σ = 267488592. Its totient is φ = 264226212.

The previous prime is 265857349. The next prime is 265857419. The reversal of 265857401 is 104758562.

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 265857401 - 2¹⁰ = 265856377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265857421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815351 + ... + 815676.

It is an arithmetic number, because the mean of its divisors is an integer number (66872148).

Almost surely, 2^265857401 is an apocalyptic number.

It is an amenable number.

265857401 is a deficient number, since it is larger than the sum of its proper divisors (1631191).

265857401 is a wasteful number, since it uses less digits than its factorization.

265857401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631190.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 265857401 is about 16305.1341914135. The cubic root of 265857401 is about 643.0078154598.

The spelling of 265857401 in words is "two hundred sixty-five million, eight hundred fifty-seven thousand, four hundred one".