261226595 has 12 divisors (see below), whose sum is σ = 364651344. Its totient is φ = 179126640.

The previous prime is 261226579. The next prime is 261226597. The reversal of 261226595 is 595622162.

It is not a de Polignac number, because 261226595 - 2⁴ = 261226579 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261226597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532871 + ... + 533360.

It is an arithmetic number, because the mean of its divisors is an integer number (30387612).

Almost surely, 2^261226595 is an apocalyptic number.

261226595 is a deficient number, since it is larger than the sum of its proper divisors (103424749).

261226595 is a wasteful number, since it uses less digits than its factorization.

261226595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066250 (or 1066243 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 261226595 is about 16162.5058391327. The cubic root of 261226595 is about 639.2525412794.

The spelling of 261226595 in words is "two hundred sixty-one million, two hundred twenty-six thousand, five hundred ninety-five".