261742201 has 12 divisors (see below), whose sum is σ = 305651968. Its totient is φ = 219564072.

The previous prime is 261742193. The next prime is 261742211. The reversal of 261742201 is 102247162.

It is not a de Polignac number, because 261742201 - 2³ = 261742193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261742211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7000 + ... + 23926.

Almost surely, 2^261742201 is an apocalyptic number.

It is an amenable number.

261742201 is a deficient number, since it is larger than the sum of its proper divisors (43909767).

261742201 is an equidigital number, since it uses as much as digits as its factorization.

261742201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17028 (or 16981 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 261742201 is about 16178.4486586323. The cubic root of 261742201 is about 639.6728479332.

Adding to 261742201 its reverse (102247162), we get a palindrome (363989363).

The spelling of 261742201 in words is "two hundred sixty-one million, seven hundred forty-two thousand, two hundred one".