261732027 has 4 divisors (see below), whose sum is σ = 348976040. Its totient is φ = 174488016.

The previous prime is 261731959. The next prime is 261732067. The reversal of 261732027 is 720237162.

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

It is a de Polignac number, because none of the positive numbers 2^k-261732027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261731985 and 261732003.

It is not an unprimeable number, because it can be changed into a prime (261732067) 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 3 ways as a sum of consecutive naturals, for example, 43622002 + ... + 43622007.

It is an arithmetic number, because the mean of its divisors is an integer number (87244010).

Almost surely, 2^261732027 is an apocalyptic number.

261732027 is a deficient number, since it is larger than the sum of its proper divisors (87244013).

261732027 is an equidigital number, since it uses as much as digits as its factorization.

261732027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87244012.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 261732027 is about 16178.1342249346. The cubic root of 261732027 is about 639.6645597323.

Adding to 261732027 its reverse (720237162), we get a palindrome (981969189).

The spelling of 261732027 in words is "two hundred sixty-one million, seven hundred thirty-two thousand, twenty-seven".