261201063 has 4 divisors (see below), whose sum is σ = 348268088. Its totient is φ = 174134040.

The previous prime is 261201053. The next prime is 261201067. The reversal of 261201063 is 360102162.

It is a happy number.

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

It is not a de Polignac number, because 261201063 - 2⁴ = 261201047 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 (261201067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43533508 + ... + 43533513.

It is an arithmetic number, because the mean of its divisors is an integer number (87067022).

Almost surely, 2^261201063 is an apocalyptic number.

261201063 is a deficient number, since it is larger than the sum of its proper divisors (87067025).

261201063 is an equidigital number, since it uses as much as digits as its factorization.

261201063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87067024.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 261201063 is about 16161.7159670624. The cubic root of 261201063 is about 639.2317139874.

The spelling of 261201063 in words is "two hundred sixty-one million, two hundred one thousand, sixty-three".