1231004140 has 24 divisors (see below), whose sum is σ = 2586103632. Its totient is φ = 492212160.

The previous prime is 1231004111. The next prime is 1231004147. The reversal of 1231004140 is 414001321.

It is not an unprimeable number, because it can be changed into a prime (1231004147) 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 7 ways as a sum of consecutive naturals, for example, 49062 + ... + 69778.

It is an arithmetic number, because the mean of its divisors is an integer number (107754318).

Almost surely, 2^1231004140 is an apocalyptic number.

1231004140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231004140 is an abundant number, since it is smaller than the sum of its proper divisors (1355099492).

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

1231004140 is a wasteful number, since it uses less digits than its factorization.

1231004140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23697 (or 23695 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1231004140 is about 35085.6685841955. The cubic root of 1231004140 is about 1071.7327559771.

Adding to 1231004140 its reverse (414001321), we get a palindrome (1645005461).

The spelling of 1231004140 in words is "one billion, two hundred thirty-one million, four thousand, one hundred forty".