261220627 has 2 divisors, whose sum is σ = 261220628. Its totient is φ = 261220626.

The previous prime is 261220549. The next prime is 261220693. The reversal of 261220627 is 726022162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261220627 - 2¹⁵ = 261187859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261220595 and 261220604.

It is not a weakly prime, because it can be changed into another prime (261220697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130610313 + 130610314.

It is an arithmetic number, because the mean of its divisors is an integer number (130610314).

Almost surely, 2^261220627 is an apocalyptic number.

261220627 is a deficient number, since it is larger than the sum of its proper divisors (1).

261220627 is an equidigital number, since it uses as much as digits as its factorization.

261220627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 261220627 is about 16162.3212132416. The cubic root of 261220627 is about 639.2476731071.

Adding to 261220627 its reverse (726022162), we get a palindrome (987242789).

The spelling of 261220627 in words is "two hundred sixty-one million, two hundred twenty thousand, six hundred twenty-seven".