261124055 has 16 divisors (see below), whose sum is σ = 318786624. Its totient is φ = 205305600.

The previous prime is 261124009. The next prime is 261124081. The reversal of 261124055 is 550421162.

It is not a de Polignac number, because 261124055 - 2¹² = 261119959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68705 + ... + 72405.

It is an arithmetic number, because the mean of its divisors is an integer number (19924164).

Almost surely, 2^261124055 is an apocalyptic number.

261124055 is a deficient number, since it is larger than the sum of its proper divisors (57662569).

261124055 is a wasteful number, since it uses less digits than its factorization.

261124055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 261124055 is about 16159.3333711512. Note that the first 4 decimals coincide. The cubic root of 261124055 is about 639.1688878084.

The spelling of 261124055 in words is "two hundred sixty-one million, one hundred twenty-four thousand, fifty-five".