1265417064 has 24 divisors (see below), whose sum is σ = 3427171410. Its totient is φ = 421805664.

The previous prime is 1265417039. The next prime is 1265417093. The reversal of 1265417064 is 4607145621.

It can be written as a sum of positive squares in only one way, i.e., 971568900 + 293848164 = 31170^2 + 17142^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 5 ways as a sum of consecutive naturals, for example, 8787547 + ... + 8787690.

Almost surely, 2^1265417064 is an apocalyptic number.

It is an amenable number.

1265417064 is an abundant number, since it is smaller than the sum of its proper divisors (2161754346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265417064 is a wasteful number, since it uses less digits than its factorization.

1265417064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17575249 (or 17575242 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1265417064 is about 35572.7011063259. The cubic root of 1265417064 is about 1081.6279358477.

The spelling of 1265417064 in words is "one billion, two hundred sixty-five million, four hundred seventeen thousand, sixty-four".