261241063 has 8 divisors (see below), whose sum is σ = 266208800. Its totient is φ = 256320288.

The previous prime is 261241049. The next prime is 261241067. The reversal of 261241063 is 360142162.

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 261241063 - 2¹⁷ = 261109991 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 (261241067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408 + ... + 22861.

It is an arithmetic number, because the mean of its divisors is an integer number (33276100).

Almost surely, 2^261241063 is an apocalyptic number.

261241063 is a deficient number, since it is larger than the sum of its proper divisors (4967737).

261241063 is a wasteful number, since it uses less digits than its factorization.

261241063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23481.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 261241063 is about 16162.9534120469. The cubic root of 261241063 is about 639.2643427003.

The spelling of 261241063 in words is "two hundred sixty-one million, two hundred forty-one thousand, sixty-three".