1242251333 has 4 divisors (see below), whose sum is σ = 1272550188. Its totient is φ = 1211952480.

The previous prime is 1242251323. The next prime is 1242251341. The reversal of 1242251333 is 3331522421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 492751204 + 749500129 = 22198^2 + 27377^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242251333 - 2¹⁴ = 1242234949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242251323) 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, 15149366 + ... + 15149447.

It is an arithmetic number, because the mean of its divisors is an integer number (318137547).

Almost surely, 2^1242251333 is an apocalyptic number.

It is an amenable number.

1242251333 is a deficient number, since it is larger than the sum of its proper divisors (30298855).

1242251333 is an equidigital number, since it uses as much as digits as its factorization.

1242251333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30298854.

The product of its digits is 4320, while the sum is 26.

The square root of 1242251333 is about 35245.5860073286. The cubic root of 1242251333 is about 1074.9868635135.

Adding to 1242251333 its reverse (3331522421), we get a palindrome (4573773754).

The spelling of 1242251333 in words is "one billion, two hundred forty-two million, two hundred fifty-one thousand, three hundred thirty-three".