1242533141 has 4 divisors (see below), whose sum is σ = 1242624972. Its totient is φ = 1242441312.

The previous prime is 1242533129. The next prime is 1242533147. The reversal of 1242533141 is 1413352421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 284630641 + 957902500 = 16871^2 + 30950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242533141 - 2¹⁰ = 1242532117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242533141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242533147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21176 + ... + 54161.

It is an arithmetic number, because the mean of its divisors is an integer number (310656243).

Almost surely, 2^1242533141 is an apocalyptic number.

It is an amenable number.

1242533141 is a deficient number, since it is larger than the sum of its proper divisors (91831).

1242533141 is an equidigital number, since it uses as much as digits as its factorization.

1242533141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91830.

The product of its digits is 2880, while the sum is 26.

The square root of 1242533141 is about 35249.5835578238. The cubic root of 1242533141 is about 1075.0681452384.

Adding to 1242533141 its reverse (1413352421), we get a palindrome (2655885562).

The spelling of 1242533141 in words is "one billion, two hundred forty-two million, five hundred thirty-three thousand, one hundred forty-one".