1243100002 has 4 divisors (see below), whose sum is σ = 1864650006. Its totient is φ = 621550000.

The previous prime is 1243099987. The next prime is 1243100011. The reversal of 1243100002 is 2000013421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2000013421 = 7 ⋅285716203.

It can be written as a sum of positive squares in only one way, i.e., 1183979281 + 59120721 = 34409^2 + 7689^2 .

It is a super-2 number, since 2×1243100002² = 3090595229944800008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310774999 + ... + 310775002.

Almost surely, 2^1243100002 is an apocalyptic number.

1243100002 is a deficient number, since it is larger than the sum of its proper divisors (621550004).

1243100002 is an equidigital number, since it uses as much as digits as its factorization.

1243100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621550003.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1243100002 is about 35257.6233175182. The cubic root of 1243100002 is about 1075.2316074252.

Adding to 1243100002 its reverse (2000013421), we get a palindrome (3243113423).

The spelling of 1243100002 in words is "one billion, two hundred forty-three million, one hundred thousand, two".