1242243133 has 16 divisors (see below), whose sum is σ = 1333043712. Its totient is φ = 1154736000.

The previous prime is 1242243127. The next prime is 1242243151. The reversal of 1242243133 is 3313422421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242243133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242243098 and 1242243107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242247133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253123 + ... + 257983.

It is an arithmetic number, because the mean of its divisors is an integer number (83315232).

Almost surely, 2^1242243133 is an apocalyptic number.

It is an amenable number.

1242243133 is a deficient number, since it is larger than the sum of its proper divisors (90800579).

1242243133 is a wasteful number, since it uses less digits than its factorization.

1242243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196.

The product of its digits is 3456, while the sum is 25.

The square root of 1242243133 is about 35245.4696805136. The cubic root of 1242243133 is about 1074.9844982080.

Adding to 1242243133 its reverse (3313422421), we get a palindrome (4555665554).

It can be divided in two parts, 12422 and 43133, that added together give a palindrome (55555).

The spelling of 1242243133 in words is "one billion, two hundred forty-two million, two hundred forty-three thousand, one hundred thirty-three".