261207 has 6 divisors (see below), whose sum is σ = 377312. Its totient is φ = 174132.

The previous prime is 261169. The next prime is 261223. The reversal of 261207 is 702162.

It is a happy number.

It is not a de Polignac number, because 261207 - 2⁸ = 260951 is a prime.

It is a Duffinian number.

261207 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 261207.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261207.

It is not an unprimeable number, because it can be changed into a prime (261407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14503 + ... + 14520.

2²⁶¹²⁰⁷ is an apocalyptic number.

261207 is a deficient number, since it is larger than the sum of its proper divisors (116105).

261207 is a wasteful number, since it uses less digits than its factorization.

261207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29029 (or 29026 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 261207 is about 511.0841418005. The cubic root of 261207 is about 63.9236557115.

Adding to 261207 its reverse (702162), we get a palindrome (963369).

The spelling of 261207 in words is "two hundred sixty-one thousand, two hundred seven".