261162015 has 16 divisors (see below), whose sum is σ = 418409088. Its totient is φ = 139103136.

The previous prime is 261161977. The next prime is 261162017. The reversal of 261162015 is 510261162.

It is not a de Polignac number, because 261162015 - 2⁶ = 261161951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261162017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744 + ... + 22866.

It is an arithmetic number, because the mean of its divisors is an integer number (26150568).

Almost surely, 2^261162015 is an apocalyptic number.

261162015 is a deficient number, since it is larger than the sum of its proper divisors (157247073).

261162015 is a wasteful number, since it uses less digits than its factorization.

261162015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 261162015 is about 16160.5078818705. The cubic root of 261162015 is about 639.1998586246.

The spelling of 261162015 in words is "two hundred sixty-one million, one hundred sixty-two thousand, fifteen".