261252371 has 2 divisors, whose sum is σ = 261252372. Its totient is φ = 261252370.

The previous prime is 261252359. The next prime is 261252373. The reversal of 261252371 is 173252162.

It is a happy number.

261252371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261252371 - 2²⁶ = 194143507 is a prime.

Together with 261252373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261252373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130626185 + 130626186.

It is an arithmetic number, because the mean of its divisors is an integer number (130626186).

Almost surely, 2^261252371 is an apocalyptic number.

261252371 is a deficient number, since it is larger than the sum of its proper divisors (1).

261252371 is an equidigital number, since it uses as much as digits as its factorization.

261252371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 261252371 is about 16163.3032205673. The cubic root of 261252371 is about 639.2735662336.

The spelling of 261252371 in words is "two hundred sixty-one million, two hundred fifty-two thousand, three hundred seventy-one".