1266959394 has 40 divisors (see below), whose sum is σ = 2865498768. Its totient is φ = 418367160.

The previous prime is 1266959381. The next prime is 1266959399. The reversal of 1266959394 is 4939596621.

It is a super-2 number, since 2×1266959394² = 3210372212089694472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266959394.

It is not an unprimeable number, because it can be changed into a prime (1266959399) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19212 + ... + 53879.

Almost surely, 2^1266959394 is an apocalyptic number.

1266959394 is an abundant number, since it is smaller than the sum of its proper divisors (1598539374).

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

1266959394 is a wasteful number, since it uses less digits than its factorization.

1266959394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73212 (or 73203 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 1266959394 is about 35594.3730665396. The cubic root of 1266959394 is about 1082.0671981162.

The spelling of 1266959394 in words is "one billion, two hundred sixty-six million, nine hundred fifty-nine thousand, three hundred ninety-four".