261226411 has 2 divisors, whose sum is σ = 261226412. Its totient is φ = 261226410.

The previous prime is 261226393. The next prime is 261226451. The reversal of 261226411 is 114622162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261226411 - 2²¹ = 259129259 is a prime.

It is not a weakly prime, because it can be changed into another prime (261226451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130613205 + 130613206.

It is an arithmetic number, because the mean of its divisors is an integer number (130613206).

Almost surely, 2^261226411 is an apocalyptic number.

261226411 is a deficient number, since it is larger than the sum of its proper divisors (1).

261226411 is an equidigital number, since it uses as much as digits as its factorization.

261226411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 261226411 is about 16162.5001469451. The cubic root of 261226411 is about 639.2523911894.

Adding to 261226411 its reverse (114622162), we get a palindrome (375848573).

The spelling of 261226411 in words is "two hundred sixty-one million, two hundred twenty-six thousand, four hundred eleven".