1264618745 has 32 divisors (see below), whose sum is σ = 1683780000. Its totient is φ = 905748480.

The previous prime is 1264618727. The next prime is 1264618753. The reversal of 1264618745 is 5478164621.

It can be written as a sum of positive squares in 16 ways, for example, as 695271424 + 569347321 = 26368^2 + 23861^2 .

It is not a de Polignac number, because 1264618745 - 2²² = 1260424441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1264618696 and 1264618705.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011881 + ... + 1013129.

It is an arithmetic number, because the mean of its divisors is an integer number (52618125).

Almost surely, 2^1264618745 is an apocalyptic number.

It is an amenable number.

1264618745 is a deficient number, since it is larger than the sum of its proper divisors (419161255).

1264618745 is a wasteful number, since it uses less digits than its factorization.

1264618745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725.

The product of its digits is 322560, while the sum is 44.

The square root of 1264618745 is about 35561.4783860289. The cubic root of 1264618745 is about 1081.4004309395.

The spelling of 1264618745 in words is "one billion, two hundred sixty-four million, six hundred eighteen thousand, seven hundred forty-five".