261458485 has 4 divisors (see below), whose sum is σ = 313750188. Its totient is φ = 209166784.

The previous prime is 261458471. The next prime is 261458501. The reversal of 261458485 is 584854162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34082244 + 227376241 = 5838^2 + 15079^2 .

It is a cyclic number.

It is not a de Polignac number, because 261458485 - 2¹⁷ = 261327413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26145844 + ... + 26145853.

It is an arithmetic number, because the mean of its divisors is an integer number (78437547).

Almost surely, 2^261458485 is an apocalyptic number.

It is an amenable number.

261458485 is a deficient number, since it is larger than the sum of its proper divisors (52291703).

261458485 is an equidigital number, since it uses as much as digits as its factorization.

261458485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52291702.

The product of its digits is 307200, while the sum is 43.

The square root of 261458485 is about 16169.6779497923. The cubic root of 261458485 is about 639.4416394714.

The spelling of 261458485 in words is "two hundred sixty-one million, four hundred fifty-eight thousand, four hundred eighty-five".