261442201 has 8 divisors (see below), whose sum is σ = 278034120. Its totient is φ = 244985088.

The previous prime is 261442183. The next prime is 261442211. The reversal of 261442201 is 102244162.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59660176 + 201782025 = 7724^2 + 14205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261442201 - 2¹³ = 261434009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261442211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29686 + ... + 37471.

It is an arithmetic number, because the mean of its divisors is an integer number (34754265).

Almost surely, 2^261442201 is an apocalyptic number.

It is an amenable number.

261442201 is a deficient number, since it is larger than the sum of its proper divisors (16591919).

261442201 is a wasteful number, since it uses less digits than its factorization.

261442201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67403.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 261442201 is about 16169.1744068768. The cubic root of 261442201 is about 639.4283640893.

Adding to 261442201 its reverse (102244162), we get a palindrome (363686363).

The spelling of 261442201 in words is "two hundred sixty-one million, four hundred forty-two thousand, two hundred one".