261007 has 4 divisors (see below), whose sum is σ = 262456. Its totient is φ = 259560.

The previous prime is 260999. The next prime is 261011. The reversal of 261007 is 700162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261007 - 2³ = 260999 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261017) 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, 408 + ... + 829.

It is an arithmetic number, because the mean of its divisors is an integer number (65614).

2²⁶¹⁰⁰⁷ is an apocalyptic number.

261007 is a deficient number, since it is larger than the sum of its proper divisors (1449).

261007 is a wasteful number, since it uses less digits than its factorization.

261007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 261007 is about 510.8884418344. Note that the first 3 decimals coincide. The cubic root of 261007 is about 63.9073366037.

Adding to 261007 its reverse (700162), we get a palindrome (961169).

It can be divided in two parts, 2 and 61007, that added together give a square (61009 = 247²).

The spelling of 261007 in words is "two hundred sixty-one thousand, seven".