261234451 has 2 divisors, whose sum is σ = 261234452. Its totient is φ = 261234450.

The previous prime is 261234397. The next prime is 261234499. The reversal of 261234451 is 154432162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261234451 - 2²³ = 252845843 is a prime.

It is not a weakly prime, because it can be changed into another prime (261234251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130617225 + 130617226.

It is an arithmetic number, because the mean of its divisors is an integer number (130617226).

Almost surely, 2^261234451 is an apocalyptic number.

261234451 is a deficient number, since it is larger than the sum of its proper divisors (1).

261234451 is an equidigital number, since it uses as much as digits as its factorization.

261234451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 261234451 is about 16162.7488689270. The cubic root of 261234451 is about 639.2589494039.

The spelling of 261234451 in words is "two hundred sixty-one million, two hundred thirty-four thousand, four hundred fifty-one".