1265725126 has 16 divisors (see below), whose sum is σ = 1965403440. Its totient is φ = 610620640.

The previous prime is 1265725117. The next prime is 1265725151. The reversal of 1265725126 is 6215275621.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 88281 + ... + 101611.

It is an arithmetic number, because the mean of its divisors is an integer number (122837715).

Almost surely, 2^1265725126 is an apocalyptic number.

1265725126 is a deficient number, since it is larger than the sum of its proper divisors (699678314).

1265725126 is a wasteful number, since it uses less digits than its factorization.

1265725126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14999.

The product of its digits is 50400, while the sum is 37.

The square root of 1265725126 is about 35577.0308766766. The cubic root of 1265725126 is about 1081.7157017548.

The spelling of 1265725126 in words is "one billion, two hundred sixty-five million, seven hundred twenty-five thousand, one hundred twenty-six".