261067451 has 2 divisors, whose sum is σ = 261067452. Its totient is φ = 261067450.

The previous prime is 261067409. The next prime is 261067537. The reversal of 261067451 is 154760162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261067451 - 2²² = 256873147 is a prime.

It is not a weakly prime, because it can be changed into another prime (261064451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130533725 + 130533726.

It is an arithmetic number, because the mean of its divisors is an integer number (130533726).

Almost surely, 2^261067451 is an apocalyptic number.

261067451 is a deficient number, since it is larger than the sum of its proper divisors (1).

261067451 is an equidigital number, since it uses as much as digits as its factorization.

261067451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 261067451 is about 16157.5818425902. The cubic root of 261067451 is about 639.1227001445.

The spelling of 261067451 in words is "two hundred sixty-one million, sixty-seven thousand, four hundred fifty-one".