261425512 has 16 divisors (see below), whose sum is σ = 502128900. Its totient is φ = 127524480.

The previous prime is 261425467. The next prime is 261425513. The reversal of 261425512 is 215524162.

It can be written as a sum of positive squares in 2 ways, for example, as 251095716 + 10329796 = 15846^2 + 3214^2 .

It is not an unprimeable number, because it can be changed into a prime (261425513) 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 3 ways as a sum of consecutive naturals, for example, 398187 + ... + 398842.

Almost surely, 2^261425512 is an apocalyptic number.

It is an amenable number.

261425512 is a deficient number, since it is larger than the sum of its proper divisors (240703388).

261425512 is a wasteful number, since it uses less digits than its factorization.

261425512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797076 (or 797072 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 261425512 is about 16168.6583240540. The cubic root of 261425512 is about 639.4147579627.

Adding to 261425512 its reverse (215524162), we get a palindrome (476949674).

The spelling of 261425512 in words is "two hundred sixty-one million, four hundred twenty-five thousand, five hundred twelve".