1243036156 has 12 divisors (see below), whose sum is σ = 2177962192. Its totient is φ = 620761248.

The previous prime is 1243036147. The next prime is 1243036159. The reversal of 1243036156 is 6516303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243036159) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 185505 + ... + 192088.

Almost surely, 2^1243036156 is an apocalyptic number.

It is an amenable number.

1243036156 is a deficient number, since it is larger than the sum of its proper divisors (934926036).

1243036156 is a wasteful number, since it uses less digits than its factorization.

1243036156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378420 (or 378418 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1243036156 is about 35256.7178846812. The cubic root of 1243036156 is about 1075.2131990342.

Adding to 1243036156 its reverse (6516303421), we get a palindrome (7759339577).

The spelling of 1243036156 in words is "one billion, two hundred forty-three million, thirty-six thousand, one hundred fifty-six".