261141027 has 32 divisors (see below), whose sum is σ = 413683200. Its totient is φ = 143367168.

The previous prime is 261140989. The next prime is 261141031. The reversal of 261141027 is 720141162.

It is not a de Polignac number, because 261141027 - 2²⁰ = 260092451 is a prime.

It is a super-2 number, since 2×261141027² = 136389271965229458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261140988 and 261141006.

It is not an unprimeable number, because it can be changed into a prime (261141047) 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 31 ways as a sum of consecutive naturals, for example, 137299 + ... + 139187.

It is an arithmetic number, because the mean of its divisors is an integer number (12927600).

Almost surely, 2^261141027 is an apocalyptic number.

261141027 is a deficient number, since it is larger than the sum of its proper divisors (152542173).

261141027 is a wasteful number, since it uses less digits than its factorization.

261141027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 261141027 is about 16159.8585080439. The cubic root of 261141027 is about 639.1827352998.

Adding to 261141027 its reverse (720141162), we get a palindrome (981282189).

The spelling of 261141027 in words is "two hundred sixty-one million, one hundred forty-one thousand, twenty-seven".