261295469 has 2 divisors, whose sum is σ = 261295470. Its totient is φ = 261295468.

The previous prime is 261295453. The next prime is 261295471. The reversal of 261295469 is 964592162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261242569 + 52900 = 16163^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 261295469 - 2⁴ = 261295453 is a prime.

It is a super-2 number, since 2×261295469² = 136550644239859922, which contains 22 as substring.

Together with 261295471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261295409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130647734 + 130647735.

It is an arithmetic number, because the mean of its divisors is an integer number (130647735).

Almost surely, 2^261295469 is an apocalyptic number.

It is an amenable number.

261295469 is a deficient number, since it is larger than the sum of its proper divisors (1).

261295469 is an equidigital number, since it uses as much as digits as its factorization.

261295469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 261295469 is about 16164.6363707941. The cubic root of 261295469 is about 639.3087172986.

The spelling of 261295469 in words is "two hundred sixty-one million, two hundred ninety-five thousand, four hundred sixty-nine".