261126135 has 48 divisors (see below), whose sum is σ = 462530016. Its totient is φ = 136249344.

The previous prime is 261126133. The next prime is 261126157. The reversal of 261126135 is 531621162.

It is not a de Polignac number, because 261126135 - 2¹ = 261126133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261126099 and 261126108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261126133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 774687 + ... + 775023.

It is an arithmetic number, because the mean of its divisors is an integer number (9636042).

Almost surely, 2^261126135 is an apocalyptic number.

261126135 is a deficient number, since it is larger than the sum of its proper divisors (201403881).

261126135 is a wasteful number, since it uses less digits than its factorization.

261126135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 669 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261126135 is about 16159.3977301136. The cubic root of 261126135 is about 639.1705849171.

Adding to 261126135 its reverse (531621162), we get a palindrome (792747297).

The spelling of 261126135 in words is "two hundred sixty-one million, one hundred twenty-six thousand, one hundred thirty-five".