1265788045 has 8 divisors (see below), whose sum is σ = 1530906624. Its totient is φ = 1004656464.

The previous prime is 1265788031. The next prime is 1265788081. The reversal of 1265788045 is 5408875621.

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

It is a cyclic number.

It is not a de Polignac number, because 1265788045 - 2¹⁹ = 1265263757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1265787986 and 1265788004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996049 + ... + 997318.

It is an arithmetic number, because the mean of its divisors is an integer number (191363328).

Almost surely, 2^1265788045 is an apocalyptic number.

It is an amenable number.

1265788045 is a deficient number, since it is larger than the sum of its proper divisors (265118579).

1265788045 is a wasteful number, since it uses less digits than its factorization.

1265788045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993499.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 1265788045 is about 35577.9151300354. The cubic root of 1265788045 is about 1081.7336254311.

The spelling of 1265788045 in words is "one billion, two hundred sixty-five million, seven hundred eighty-eight thousand, forty-five".