261073451 has 2 divisors, whose sum is σ = 261073452. Its totient is φ = 261073450.

The previous prime is 261073441. The next prime is 261073481. The reversal of 261073451 is 154370162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261073451 - 2⁶ = 261073387 is a prime.

It is equal to p_14251295 and since 261073451 and 14251295 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (261073411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130536725 + 130536726.

It is an arithmetic number, because the mean of its divisors is an integer number (130536726).

Almost surely, 2^261073451 is an apocalyptic number.

261073451 is a deficient number, since it is larger than the sum of its proper divisors (1).

261073451 is an equidigital number, since it uses as much as digits as its factorization.

261073451 is an odious number, because the sum of its binary digits is odd.

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

The square root of 261073451 is about 16157.7675128713. The cubic root of 261073451 is about 639.1275963336.

The spelling of 261073451 in words is "two hundred sixty-one million, seventy-three thousand, four hundred fifty-one".