261241239 has 8 divisors (see below), whose sum is σ = 398081920. Its totient is φ = 149280696.

The previous prime is 261241177. The next prime is 261241301. The reversal of 261241239 is 932142162.

It is an interprime number because it is at equal distance from previous prime (261241177) and next prime (261241301).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261241239 - 2⁸ = 261240983 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 (261241639) 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, 6220009 + ... + 6220050.

It is an arithmetic number, because the mean of its divisors is an integer number (49760240).

Almost surely, 2^261241239 is an apocalyptic number.

261241239 is a deficient number, since it is larger than the sum of its proper divisors (136840681).

261241239 is a wasteful number, since it uses less digits than its factorization.

261241239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12440069.

The product of its digits is 5184, while the sum is 30.

The square root of 261241239 is about 16162.9588565955. The cubic root of 261241239 is about 639.2644862593.

The spelling of 261241239 in words is "two hundred sixty-one million, two hundred forty-one thousand, two hundred thirty-nine".