1231001004 has 24 divisors (see below), whose sum is σ = 2901950128. Its totient is φ = 406103040.

The previous prime is 1231000993. The next prime is 1231001027. The reversal of 1231001004 is 4001001321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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, 527617 + ... + 529944.

Almost surely, 2^1231001004 is an apocalyptic number.

It is an amenable number.

1231001004 is an abundant number, since it is smaller than the sum of its proper divisors (1670949124).

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

1231001004 is a wasteful number, since it uses less digits than its factorization.

1231001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057665 (or 1057663 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1231001004 is about 35085.6238935550. The cubic root of 1231001004 is about 1071.7318458917.

Adding to 1231001004 its reverse (4001001321), we get a palindrome (5232002325).

The spelling of 1231001004 in words is "one billion, two hundred thirty-one million, one thousand, four".