261304253 has 8 divisors (see below), whose sum is σ = 299468160. Its totient is φ = 223349040.

The previous prime is 261304247. The next prime is 261304261. The reversal of 261304253 is 352403162.

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 261304253 - 2⁴ = 261304237 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 (261304243) 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, 49478 + ... + 54503.

It is an arithmetic number, because the mean of its divisors is an integer number (37433520).

Almost surely, 2^261304253 is an apocalyptic number.

It is an amenable number.

261304253 is a deficient number, since it is larger than the sum of its proper divisors (38163907).

261304253 is a wasteful number, since it uses less digits than its factorization.

261304253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104347.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 261304253 is about 16164.9080727358. The cubic root of 261304253 is about 639.3158811234.

The spelling of 261304253 in words is "two hundred sixty-one million, three hundred four thousand, two hundred fifty-three".