265798401 has 24 divisors (see below), whose sum is σ = 393382080. Its totient is φ = 159503520.

The previous prime is 265798381. The next prime is 265798409. The reversal of 265798401 is 104897562.

It is not a de Polignac number, because 265798401 - 2¹⁰ = 265797377 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265798409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33835 + ... + 40943.

It is an arithmetic number, because the mean of its divisors is an integer number (16390920).

Almost surely, 2^265798401 is an apocalyptic number.

It is an amenable number.

265798401 is a deficient number, since it is larger than the sum of its proper divisors (127583679).

265798401 is a wasteful number, since it uses less digits than its factorization.

265798401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7226 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 265798401 is about 16303.3248449511. The cubic root of 265798401 is about 642.9602457631.

It can be divided in two parts, 26579 and 8401, that added together give a triangular number (34980 = T₂₆₄).

The spelling of 265798401 in words is "two hundred sixty-five million, seven hundred ninety-eight thousand, four hundred one".