1243402102 has 4 divisors (see below), whose sum is σ = 1865103156. Its totient is φ = 621701050.

The previous prime is 1243402099. The next prime is 1243402133. The reversal of 1243402102 is 2012043421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2012043421 = 83 ⋅24241487.

It is a self number, because there is not a number n which added to its sum of digits gives 1243402102.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 310850524 + ... + 310850527.

It is an arithmetic number, because the mean of its divisors is an integer number (466275789).

Almost surely, 2^1243402102 is an apocalyptic number.

1243402102 is a deficient number, since it is larger than the sum of its proper divisors (621701054).

1243402102 is an equidigital number, since it uses as much as digits as its factorization.

1243402102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621701053.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1243402102 is about 35261.9072371306. The cubic root of 1243402102 is about 1075.3187018285.

Adding to 1243402102 its reverse (2012043421), we get a palindrome (3255445523).

The spelling of 1243402102 in words is "one billion, two hundred forty-three million, four hundred two thousand, one hundred two".