261179201 has 4 divisors (see below), whose sum is σ = 261238404. Its totient is φ = 261120000.

The previous prime is 261179197. The next prime is 261179203. The reversal of 261179201 is 102971162.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169000000 + 92179201 = 13000^2 + 9601^2 .

It is a cyclic number.

It is not a de Polignac number, because 261179201 - 2² = 261179197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261179203) 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, 22400 + ... + 32001.

It is an arithmetic number, because the mean of its divisors is an integer number (65309601).

Almost surely, 2^261179201 is an apocalyptic number.

It is an amenable number.

261179201 is a deficient number, since it is larger than the sum of its proper divisors (59203).

261179201 is an equidigital number, since it uses as much as digits as its factorization.

261179201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59202.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 261179201 is about 16161.0396014613. The cubic root of 261179201 is about 639.2138793566.

The spelling of 261179201 in words is "two hundred sixty-one million, one hundred seventy-nine thousand, two hundred one".