261307 has 8 divisors (see below), whose sum is σ = 291600. Its totient is φ = 232704.

The previous prime is 261301. The next prime is 261323. The reversal of 261307 is 703162.

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 261307 - 2¹⁵ = 228539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261301) 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, 82 + ... + 727.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2²⁶¹³⁰⁷ is an apocalyptic number.

261307 is a deficient number, since it is larger than the sum of its proper divisors (30293).

261307 is a wasteful number, since it uses less digits than its factorization.

261307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 261307 is about 511.1819636881. The cubic root of 261307 is about 63.9318121417.

Adding to 261307 its reverse (703162), we get a palindrome (964469).

The spelling of 261307 in words is "two hundred sixty-one thousand, three hundred seven".