261250027 has 2 divisors, whose sum is σ = 261250028. Its totient is φ = 261250026.

The previous prime is 261249973. The next prime is 261250039. The reversal of 261250027 is 720052162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261250027 - 2¹⁹ = 260725739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261249983 and 261250010.

It is not a weakly prime, because it can be changed into another prime (261250097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130625013 + 130625014.

It is an arithmetic number, because the mean of its divisors is an integer number (130625014).

Almost surely, 2^261250027 is an apocalyptic number.

261250027 is a deficient number, since it is larger than the sum of its proper divisors (1).

261250027 is an equidigital number, since it uses as much as digits as its factorization.

261250027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 261250027 is about 16163.2307104737. The cubic root of 261250027 is about 639.2716543380.

The spelling of 261250027 in words is "two hundred sixty-one million, two hundred fifty thousand, twenty-seven".