261387675 has 48 divisors (see below), whose sum is σ = 481978080. Its totient is φ = 138885120.

The previous prime is 261387673. The next prime is 261387713. The reversal of 261387675 is 576783162.

261387675 is a `hidden beast` number, since 261 + 387 + 6 + 7 + 5 = 666.

It is not a de Polignac number, because 261387675 - 2¹ = 261387673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 261387675.

It is not an unprimeable number, because it can be changed into a prime (261387673) 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 in 47 ways as a sum of consecutive naturals, for example, 237727 + ... + 238823.

It is an arithmetic number, because the mean of its divisors is an integer number (10041210).

Almost surely, 2^261387675 is an apocalyptic number.

261387675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261387675 is a deficient number, since it is larger than the sum of its proper divisors (220590405).

261387675 is a wasteful number, since it uses less digits than its factorization.

261387675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1458 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 261387675 is about 16167.4882093664. The cubic root of 261387675 is about 639.3839082530.

The spelling of 261387675 in words is "two hundred sixty-one million, three hundred eighty-seven thousand, six hundred seventy-five".