1265211004 has 24 divisors (see below), whose sum is σ = 2311254848. Its totient is φ = 605413440.

The previous prime is 1265210987. The next prime is 1265211019. The reversal of 1265211004 is 4001125621.

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, 61044 + ... + 79099.

Almost surely, 2^1265211004 is an apocalyptic number.

It is an amenable number.

1265211004 is a deficient number, since it is larger than the sum of its proper divisors (1046043844).

1265211004 is a wasteful number, since it uses less digits than its factorization.

1265211004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140245 (or 140243 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1265211004 is about 35569.8046663178. The cubic root of 1265211004 is about 1081.5692220429.

Adding to 1265211004 its reverse (4001125621), we get a palindrome (5266336625).

The spelling of 1265211004 in words is "one billion, two hundred sixty-five million, two hundred eleven thousand, four".