1269494863 has 16 divisors (see below), whose sum is σ = 1595704320. Its totient is φ = 983061216.

The previous prime is 1269494813. The next prime is 1269494869. The reversal of 1269494863 is 3684949621.

It is a cyclic number.

It is not a de Polignac number, because 1269494863 - 2²⁹ = 732623951 is a prime.

It is a super-2 number, since 2×1269494863² = 3223234414366777538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1269494863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269494869) 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, 144133 + ... + 152686.

It is an arithmetic number, because the mean of its divisors is an integer number (99731520).

Almost surely, 2^1269494863 is an apocalyptic number.

1269494863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1269494863 is a deficient number, since it is larger than the sum of its proper divisors (326209457).

1269494863 is a wasteful number, since it uses less digits than its factorization.

1269494863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296886.

The product of its digits is 2239488, while the sum is 52.

The square root of 1269494863 is about 35629.9714145268. The cubic root of 1269494863 is about 1082.7885366034.

The spelling of 1269494863 in words is "one billion, two hundred sixty-nine million, four hundred ninety-four thousand, eight hundred sixty-three".