1231000002 has 48 divisors (see below), whose sum is σ = 2699456760. Its totient is φ = 405388800.

The previous prime is 1230999989. The next prime is 1231000009. The reversal of 1231000002 is 2000001321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 879774921 + 351225081 = 29661^2 + 18741^2 .

It is a super-2 number, since 2×1231000002² = 3030722009848000008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1231000009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 903802 + ... + 905162.

Almost surely, 2^1231000002 is an apocalyptic number.

1231000002 is an abundant number, since it is smaller than the sum of its proper divisors (1468456758).

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

1231000002 is a wasteful number, since it uses less digits than its factorization.

1231000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1936 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1231000002 is about 35085.6096141994. The cubic root of 1231000002 is about 1071.7315551051.

Adding to 1231000002 its reverse (2000001321), we get a palindrome (3231001323).

The spelling of 1231000002 in words is "one billion, two hundred thirty-one million, two", and thus it is an aban number.