261242327 has 4 divisors (see below), whose sum is σ = 263554320. Its totient is φ = 258930336.

The previous prime is 261242297. The next prime is 261242347. The reversal of 261242327 is 723242162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 723242162 = 2 ⋅361621081.

It is a cyclic number.

It is not a de Polignac number, because 261242327 - 2⁶ = 261242263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261242327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261242347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155827 + ... + 1156052.

It is an arithmetic number, because the mean of its divisors is an integer number (65888580).

Almost surely, 2^261242327 is an apocalyptic number.

261242327 is a deficient number, since it is larger than the sum of its proper divisors (2311993).

261242327 is a wasteful number, since it uses less digits than its factorization.

261242327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311992.

The product of its digits is 8064, while the sum is 29.

The square root of 261242327 is about 16162.9925137643. The cubic root of 261242327 is about 639.2653737133.

Adding to 261242327 its reverse (723242162), we get a palindrome (984484489).

The spelling of 261242327 in words is "two hundred sixty-one million, two hundred forty-two thousand, three hundred twenty-seven".