261346504 has 16 divisors (see below), whose sum is σ = 492515100. Its totient is φ = 130009152.

The previous prime is 261346487. The next prime is 261346531. The reversal of 261346504 is 405643162.

It can be written as a sum of positive squares in 2 ways, for example, as 189062500 + 72284004 = 13750^2 + 8502^2 .

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, 81339 + ... + 84490.

Almost surely, 2^261346504 is an apocalyptic number.

It is an amenable number.

261346504 is a deficient number, since it is larger than the sum of its proper divisors (231168596).

261346504 is a wasteful number, since it uses less digits than its factorization.

261346504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166032 (or 166028 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 261346504 is about 16166.2148940313. The cubic root of 261346504 is about 639.3503368447.

Adding to 261346504 its reverse (405643162), we get a palindrome (666989666).

The spelling of 261346504 in words is "two hundred sixty-one million, three hundred forty-six thousand, five hundred four".