1243402002 has 40 divisors (see below), whose sum is σ = 2876028672. Its totient is φ = 401095800.

The previous prime is 1243401989. The next prime is 1243402003. The reversal of 1243402002 is 2002043421.

1243402002 is a `hidden beast` number, since 124 + 340 + 200 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1243402003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118774 + ... + 128817.

Almost surely, 2^1243402002 is an apocalyptic number.

1243402002 is an abundant number, since it is smaller than the sum of its proper divisors (1632626670).

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

1243402002 is a wasteful number, since it uses less digits than its factorization.

1243402002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247636 (or 247627 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1243402002 is about 35261.9058191698. The cubic root of 1243402002 is about 1075.3186730012.

Adding to 1243402002 its reverse (2002043421), we get a palindrome (3245445423).

The spelling of 1243402002 in words is "one billion, two hundred forty-three million, four hundred two thousand, two".