1265290126 has 8 divisors (see below), whose sum is σ = 1963381320. Its totient is φ = 610829688.

The previous prime is 1265290069. The next prime is 1265290129. The reversal of 1265290126 is 6210925621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1265290091 and 1265290100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265290129) 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 3 ways as a sum of consecutive naturals, for example, 10907616 + ... + 10907731.

It is an arithmetic number, because the mean of its divisors is an integer number (245422665).

Almost surely, 2^1265290126 is an apocalyptic number.

1265290126 is a deficient number, since it is larger than the sum of its proper divisors (698091194).

1265290126 is a wasteful number, since it uses less digits than its factorization.

1265290126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815378.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1265290126 is about 35570.9168563308. The cubic root of 1265290126 is about 1081.5917674618.

The spelling of 1265290126 in words is "one billion, two hundred sixty-five million, two hundred ninety thousand, one hundred twenty-six".