261334507 has 16 divisors (see below), whose sum is σ = 301828032. Its totient is φ = 221644800.

The previous prime is 261334501. The next prime is 261334517. The reversal of 261334507 is 705433162.

It is a cyclic number.

It is not a de Polignac number, because 261334507 - 2¹¹ = 261332459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261334501) 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, 440403 + ... + 440995.

It is an arithmetic number, because the mean of its divisors is an integer number (18864252).

Almost surely, 2^261334507 is an apocalyptic number.

261334507 is a deficient number, since it is larger than the sum of its proper divisors (40493525).

261334507 is a wasteful number, since it uses less digits than its factorization.

261334507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 261334507 is about 16165.8438381669. The cubic root of 261334507 is about 639.3405536600.

Adding to 261334507 its reverse (705433162), we get a palindrome (966767669).

The spelling of 261334507 in words is "two hundred sixty-one million, three hundred thirty-four thousand, five hundred seven".