1243142002 has 4 divisors (see below), whose sum is σ = 1864713006. Its totient is φ = 621571000.

The previous prime is 1243141979. The next prime is 1243142023. The reversal of 1243142002 is 2002413421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1095543801 + 147598201 = 33099^2 + 12149^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310785499 + ... + 310785502.

Almost surely, 2^1243142002 is an apocalyptic number.

1243142002 is a deficient number, since it is larger than the sum of its proper divisors (621571004).

1243142002 is an equidigital number, since it uses as much as digits as its factorization.

1243142002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621571003.

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

The square root of 1243142002 is about 35258.2189283577. The cubic root of 1243142002 is about 1075.2437167269.

Adding to 1243142002 its reverse (2002413421), we get a palindrome (3245555423).

The spelling of 1243142002 in words is "one billion, two hundred forty-three million, one hundred forty-two thousand, two".