265641402 has 32 divisors (see below), whose sum is σ = 573935040. Its totient is φ = 81480960.

The previous prime is 265641377. The next prime is 265641403. The reversal of 265641402 is 204146562.

It is a self number, because there is not a number n which added to its sum of digits gives 265641402.

It is not an unprimeable number, because it can be changed into a prime (265641403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20674 + ... + 30962.

It is an arithmetic number, because the mean of its divisors is an integer number (17935470).

Almost surely, 2^265641402 is an apocalyptic number.

265641402 is an abundant number, since it is smaller than the sum of its proper divisors (308293638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265641402 is a wasteful number, since it uses less digits than its factorization.

265641402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 265641402 is about 16298.5091956289. The cubic root of 265641402 is about 642.8336285015.

Adding to 265641402 its reverse (204146562), we get a palindrome (469787964).

It can be divided in two parts, 26564 and 1402, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 265641402 in words is "two hundred sixty-five million, six hundred forty-one thousand, four hundred two".