261035253 has 6 divisors (see below), whose sum is σ = 377050934. Its totient is φ = 174023496.

The previous prime is 261035251. The next prime is 261035297. The reversal of 261035253 is 352530162.

261035253 is a `hidden beast` number, since 261 + 0 + 352 + 53 = 666.

It can be written as a sum of positive squares in only one way, i.e., 165328164 + 95707089 = 12858^2 + 9783^2 .

It is not a de Polignac number, because 261035253 - 2¹ = 261035251 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 (261035251) 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 5 ways as a sum of consecutive naturals, for example, 14501950 + ... + 14501967.

Almost surely, 2^261035253 is an apocalyptic number.

It is an amenable number.

261035253 is a deficient number, since it is larger than the sum of its proper divisors (116015681).

261035253 is a wasteful number, since it uses less digits than its factorization.

261035253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29003923 (or 29003920 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 261035253 is about 16156.5854375236. The cubic root of 261035253 is about 639.0964242802.

The spelling of 261035253 in words is "two hundred sixty-one million, thirty-five thousand, two hundred fifty-three".