261351127 has 2 divisors, whose sum is σ = 261351128. Its totient is φ = 261351126.

The previous prime is 261351113. The next prime is 261351131. The reversal of 261351127 is 721153162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261351127 - 2²³ = 252962519 is a prime.

It is equal to p_14265622 and since 261351127 and 14265622 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 261351095 and 261351104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261351107) 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 as a sum of consecutive naturals, namely, 130675563 + 130675564.

It is an arithmetic number, because the mean of its divisors is an integer number (130675564).

Almost surely, 2^261351127 is an apocalyptic number.

261351127 is a deficient number, since it is larger than the sum of its proper divisors (1).

261351127 is an equidigital number, since it uses as much as digits as its factorization.

261351127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 261351127 is about 16166.3578767761. The cubic root of 261351127 is about 639.3541066792.

The spelling of 261351127 in words is "two hundred sixty-one million, three hundred fifty-one thousand, one hundred twenty-seven".