1264291779 has 16 divisors (see below), whose sum is σ = 1694490624. Its totient is φ = 838488000.

The previous prime is 1264291741. The next prime is 1264291783. The reversal of 1264291779 is 9771924621.

It is not a de Polignac number, because 1264291779 - 2¹¹ = 1264289731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264291729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969642 + ... + 970944.

It is an arithmetic number, because the mean of its divisors is an integer number (105905664).

Almost surely, 2^1264291779 is an apocalyptic number.

1264291779 is a deficient number, since it is larger than the sum of its proper divisors (430198845).

1264291779 is a wasteful number, since it uses less digits than its factorization.

1264291779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738.

The product of its digits is 381024, while the sum is 48.

The square root of 1264291779 is about 35556.8808952641. The cubic root of 1264291779 is about 1081.3072245477.

The spelling of 1264291779 in words is "one billion, two hundred sixty-four million, two hundred ninety-one thousand, seven hundred seventy-nine".