1242236133 has 6 divisors (see below), whose sum is σ = 1794341094. Its totient is φ = 828157416.

The previous prime is 1242236119. The next prime is 1242236143. The reversal of 1242236133 is 3316322421.

1242236133 is a `hidden beast` number, since 1 + 2 + 42 + 2 + 3 + 613 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 724309569 + 517926564 = 26913^2 + 22758^2 .

It is not a de Polignac number, because 1242236133 - 2⁴ = 1242236117 is a prime.

It is a super-2 number, since 2×1242236133² = 3086301220261587378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242236097 and 1242236106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242236143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69013110 + ... + 69013127.

It is an arithmetic number, because the mean of its divisors is an integer number (299056849).

Almost surely, 2^1242236133 is an apocalyptic number.

It is an amenable number.

1242236133 is a deficient number, since it is larger than the sum of its proper divisors (552104961).

1242236133 is a wasteful number, since it uses less digits than its factorization.

1242236133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138026243 (or 138026240 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1242236133 is about 35245.3703768311. The cubic root of 1242236133 is about 1074.9824790366.

Adding to 1242236133 its reverse (3316322421), we get a palindrome (4558558554).

The spelling of 1242236133 in words is "one billion, two hundred forty-two million, two hundred thirty-six thousand, one hundred thirty-three".