1243002000 has 160 divisors (see below), whose sum is σ = 4029742080. Its totient is φ = 329625600.

The previous prime is 1243001993. The next prime is 1243002011. The reversal of 1243002000 is 2003421.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1337536 + ... + 1338464.

It is an arithmetic number, because the mean of its divisors is an integer number (25185888).

Almost surely, 2^1243002000 is an apocalyptic number.

1243002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014871040).

1243002000 is an abundant number, since it is smaller than the sum of its proper divisors (2786740080).

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

1243002000 is a wasteful number, since it uses less digits than its factorization.

1243002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1243002000 is about 35256.2334913984. The cubic root of 1243002000 is about 1075.2033507504.

Adding to 1243002000 its reverse (2003421), we get a palindrome (1245005421).

The spelling of 1243002000 in words is "one billion, two hundred forty-three million, two thousand".