261421062261241 has 4 divisors (see below), whose sum is σ = 261421096384000. Its totient is φ = 261421028138484.

The previous prime is 261421062261223. The next prime is 261421062261343. The reversal of 261421062261241 is 142162260124162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 261421062261241 - 2⁷ = 261421062261113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261421062261194 and 261421062261203.

It is not an unprimeable number, because it can be changed into a prime (261421062261211) 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, 360220 + ... + 22868578.

It is an arithmetic number, because the mean of its divisors is an integer number (65355274096000).

Almost surely, 2^{261421062261241} is an apocalyptic number.

It is an amenable number.

261421062261241 is a deficient number, since it is larger than the sum of its proper divisors (34122759).

261421062261241 is a wasteful number, since it uses less digits than its factorization.

261421062261241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34122758.

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 261421062261241 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, sixty-two million, two hundred sixty-one thousand, two hundred forty-one".