1242155036 has 6 divisors (see below), whose sum is σ = 2173771320. Its totient is φ = 621077516.

The previous prime is 1242155021. The next prime is 1242155053. The reversal of 1242155036 is 6305512421.

It is a super-2 number, since 2×1242155036² = 3085898266920322592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155269376 + ... + 155269383.

It is an arithmetic number, because the mean of its divisors is an integer number (362295220).

Almost surely, 2^1242155036 is an apocalyptic number.

It is an amenable number.

1242155036 is a deficient number, since it is larger than the sum of its proper divisors (931616284).

1242155036 is a wasteful number, since it uses less digits than its factorization.

1242155036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310538763 (or 310538761 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1242155036 is about 35244.2198948991. The cubic root of 1242155036 is about 1074.9590858054.

Adding to 1242155036 its reverse (6305512421), we get a palindrome (7547667457).

The spelling of 1242155036 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, thirty-six".