1235085881 has 16 divisors (see below), whose sum is σ = 1287014400. Its totient is φ = 1184367888.

The previous prime is 1235085869. The next prime is 1235085893. The reversal of 1235085881 is 1885805321.

It is an interprime number because it is at equal distance from previous prime (1235085869) and next prime (1235085893).

It is not a de Polignac number, because 1235085881 - 2¹⁴ = 1235069497 is a prime.

It is a super-2 number, since 2×1235085881² = 3050874266891092322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1235085281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161356 + ... + 1162418.

It is an arithmetic number, because the mean of its divisors is an integer number (80438400).

Almost surely, 2^1235085881 is an apocalyptic number.

It is an amenable number.

1235085881 is a deficient number, since it is larger than the sum of its proper divisors (51928519).

1235085881 is a wasteful number, since it uses less digits than its factorization.

1235085881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 1235085881 is about 35143.7886546115. The cubic root of 1235085881 is about 1072.9159931070.

The spelling of 1235085881 in words is "one billion, two hundred thirty-five million, eighty-five thousand, eight hundred eighty-one".