261124017 has 16 divisors (see below), whose sum is σ = 434076672. Its totient is φ = 135648720.

The previous prime is 261124009. The next prime is 261124081. The reversal of 261124017 is 710421162.

It is not a de Polignac number, because 261124017 - 2³ = 261124009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261124117) 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, 564973 + ... + 565434.

It is an arithmetic number, because the mean of its divisors is an integer number (27129792).

Almost surely, 2^261124017 is an apocalyptic number.

It is an amenable number.

261124017 is a deficient number, since it is larger than the sum of its proper divisors (172952655).

261124017 is a wasteful number, since it uses less digits than its factorization.

261124017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130428.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 261124017 is about 16159.3321953601. The cubic root of 261124017 is about 639.1688568034.

Adding to 261124017 its reverse (710421162), we get a palindrome (971545179).

The spelling of 261124017 in words is "two hundred sixty-one million, one hundred twenty-four thousand, seventeen".