261054449 has 2 divisors, whose sum is σ = 261054450. Its totient is φ = 261054448.

The previous prime is 261054413. The next prime is 261054467. The reversal of 261054449 is 944450162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251444449 + 9610000 = 15857^2 + 3100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261054449 is a prime.

It is not a weakly prime, because it can be changed into another prime (261056449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130527224 + 130527225.

It is an arithmetic number, because the mean of its divisors is an integer number (130527225).

Almost surely, 2^261054449 is an apocalyptic number.

It is an amenable number.

261054449 is a deficient number, since it is larger than the sum of its proper divisors (1).

261054449 is an equidigital number, since it uses as much as digits as its factorization.

261054449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 261054449 is about 16157.1794877695. The cubic root of 261054449 is about 639.1120898453.

The spelling of 261054449 in words is "two hundred sixty-one million, fifty-four thousand, four hundred forty-nine".