261004415 has 8 divisors (see below), whose sum is σ = 357948960. Its totient is φ = 178974432.

The previous prime is 261004397. The next prime is 261004427. The reversal of 261004415 is 514400162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261004415 - 2¹⁴ = 260988031 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3728600 + ... + 3728669.

It is an arithmetic number, because the mean of its divisors is an integer number (44743620).

Almost surely, 2^261004415 is an apocalyptic number.

261004415 is a deficient number, since it is larger than the sum of its proper divisors (96944545).

261004415 is an equidigital number, since it uses as much as digits as its factorization.

261004415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457281.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 261004415 is about 16155.6310616453. The cubic root of 261004415 is about 639.0712562471.

Adding to 261004415 its reverse (514400162), we get a palindrome (775404577).

The spelling of 261004415 in words is "two hundred sixty-one million, four thousand, four hundred fifteen".