261061459 has 4 divisors (see below), whose sum is σ = 261324304. Its totient is φ = 260798616.

The previous prime is 261061439. The next prime is 261061499. The reversal of 261061459 is 954160162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954160162 = 2 ⋅477080081.

It is a cyclic number.

It is not a de Polignac number, because 261061459 - 2¹⁷ = 260930387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261061439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129927 + ... + 131920.

It is an arithmetic number, because the mean of its divisors is an integer number (65331076).

Almost surely, 2^261061459 is an apocalyptic number.

261061459 is a deficient number, since it is larger than the sum of its proper divisors (262845).

261061459 is an equidigital number, since it uses as much as digits as its factorization.

261061459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262844.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 261061459 is about 16157.3964177401. The cubic root of 261061459 is about 639.1178104088.

The spelling of 261061459 in words is "two hundred sixty-one million, sixty-one thousand, four hundred fifty-nine".