261135007 has 16 divisors (see below), whose sum is σ = 302303232. Its totient is φ = 220952160.

The previous prime is 261134969. The next prime is 261135029. The reversal of 261135007 is 700531162.

It is a cyclic number.

It is not a de Polignac number, because 261135007 - 2²³ = 252746399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261135047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203853 + ... + 205129.

It is an arithmetic number, because the mean of its divisors is an integer number (18893952).

Almost surely, 2^261135007 is an apocalyptic number.

261135007 is a deficient number, since it is larger than the sum of its proper divisors (41168225).

261135007 is a wasteful number, since it uses less digits than its factorization.

261135007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 261135007 is about 16159.6722429633. The cubic root of 261135007 is about 639.1778236375.

Adding to 261135007 its reverse (700531162), we get a palindrome (961666169).

The spelling of 261135007 in words is "two hundred sixty-one million, one hundred thirty-five thousand, seven".