1231885270 has 48 divisors (see below), whose sum is σ = 2785505184. Its totient is φ = 383961600.

The previous prime is 1231885261. The next prime is 1231885283. The reversal of 1231885270 is 725881321.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64251 + ... + 81190.

It is an arithmetic number, because the mean of its divisors is an integer number (58031358).

Almost surely, 2^1231885270 is an apocalyptic number.

1231885270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231885270 is an abundant number, since it is smaller than the sum of its proper divisors (1553619914).

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

1231885270 is a wasteful number, since it uses less digits than its factorization.

1231885270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145477 (or 145466 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1231885270 is about 35098.2231744002. The cubic root of 1231885270 is about 1071.9884038203.

The spelling of 1231885270 in words is "one billion, two hundred thirty-one million, eight hundred eighty-five thousand, two hundred seventy".