261045604 has 12 divisors (see below), whose sum is σ = 467454064. Its totient is φ = 127487304.

The previous prime is 261045593. The next prime is 261045611. The reversal of 261045604 is 406540162.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 758682 + ... + 759025.

Almost surely, 2^261045604 is an apocalyptic number.

It is an amenable number.

261045604 is a deficient number, since it is larger than the sum of its proper divisors (206408460).

261045604 is a wasteful number, since it uses less digits than its factorization.

261045604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517754 (or 1517752 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 261045604 is about 16156.9057681228. The cubic root of 261045604 is about 639.1048716700.

Adding to 261045604 its reverse (406540162), we get a palindrome (667585766).

The spelling of 261045604 in words is "two hundred sixty-one million, forty-five thousand, six hundred four".