261325067 has 4 divisors (see below), whose sum is σ = 261380256. Its totient is φ = 261269880.

The previous prime is 261325049. The next prime is 261325073. The reversal of 261325067 is 760523162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261325067 - 2²⁶ = 194216203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261325007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19748 + ... + 30209.

It is an arithmetic number, because the mean of its divisors is an integer number (65345064).

Almost surely, 2^261325067 is an apocalyptic number.

261325067 is a deficient number, since it is larger than the sum of its proper divisors (55189).

261325067 is an equidigital number, since it uses as much as digits as its factorization.

261325067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55188.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 261325067 is about 16165.5518619068. The cubic root of 261325067 is about 639.3328554197.

The spelling of 261325067 in words is "two hundred sixty-one million, three hundred twenty-five thousand, sixty-seven".