261335453 has 8 divisors (see below), whose sum is σ = 272974848. Its totient is φ = 249719184.

The previous prime is 261335419. The next prime is 261335471. The reversal of 261335453 is 354533162.

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 261335453 - 2²⁶ = 194226589 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 (261335413) 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 7 ways as a sum of consecutive naturals, for example, 19775 + ... + 30227.

It is an arithmetic number, because the mean of its divisors is an integer number (34121856).

Almost surely, 2^261335453 is an apocalyptic number.

261335453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

261335453 is a deficient number, since it is larger than the sum of its proper divisors (11639395).

261335453 is a wasteful number, since it uses less digits than its factorization.

261335453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563.

The product of its digits is 32400, while the sum is 32.

The square root of 261335453 is about 16165.8730973616. The cubic root of 261335453 is about 639.3413251048.

The spelling of 261335453 in words is "two hundred sixty-one million, three hundred thirty-five thousand, four hundred fifty-three".