261254653 has 8 divisors (see below), whose sum is σ = 289020096. Its totient is φ = 234158400.

The previous prime is 261254647. The next prime is 261254671. The reversal of 261254653 is 356452162.

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 261254653 - 2⁹ = 261254141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261254603) 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 7 ways as a sum of consecutive naturals, for example, 166476 + ... + 168037.

It is an arithmetic number, because the mean of its divisors is an integer number (36127512).

Almost surely, 2^261254653 is an apocalyptic number.

It is an amenable number.

261254653 is a deficient number, since it is larger than the sum of its proper divisors (27765443).

261254653 is a wasteful number, since it uses less digits than its factorization.

261254653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334595.

The product of its digits is 43200, while the sum is 34.

The square root of 261254653 is about 16163.3738124192. The cubic root of 261254653 is about 639.2754275475.

The spelling of 261254653 in words is "two hundred sixty-one million, two hundred fifty-four thousand, six hundred fifty-three".