1235881266 has 16 divisors (see below), whose sum is σ = 2617160544. Its totient is φ = 387727424.

The previous prime is 1235881261. The next prime is 1235881271. The reversal of 1235881266 is 6621885321.

It is an interprime number because it is at equal distance from previous prime (1235881261) and next prime (1235881271).

It is not an unprimeable number, because it can be changed into a prime (1235881261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6058140 + ... + 6058343.

It is an arithmetic number, because the mean of its divisors is an integer number (163572534).

Almost surely, 2^1235881266 is an apocalyptic number.

1235881266 is an abundant number, since it is smaller than the sum of its proper divisors (1381279278).

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

1235881266 is a wasteful number, since it uses less digits than its factorization.

1235881266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12116505.

The product of its digits is 138240, while the sum is 42.

The square root of 1235881266 is about 35155.1029866220. The cubic root of 1235881266 is about 1073.1462599993.

The spelling of 1235881266 in words is "one billion, two hundred thirty-five million, eight hundred eighty-one thousand, two hundred sixty-six".