261269472 has 24 divisors (see below), whose sum is σ = 685832616. Its totient is φ = 87089792.

The previous prime is 261269471. The next prime is 261269521. The reversal of 261269472 is 274962162.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 261269472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261269471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360683 + ... + 1360874.

It is an arithmetic number, because the mean of its divisors is an integer number (28576359).

Almost surely, 2^261269472 is an apocalyptic number.

It is an amenable number.

261269472 is an abundant number, since it is smaller than the sum of its proper divisors (424563144).

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

261269472 is a wasteful number, since it uses less digits than its factorization.

261269472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721570 (or 2721562 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 261269472 is about 16163.8322188768. The cubic root of 261269472 is about 639.2875144052.

The spelling of 261269472 in words is "two hundred sixty-one million, two hundred sixty-nine thousand, four hundred seventy-two".