1242044403 has 4 divisors (see below), whose sum is σ = 1656059208. Its totient is φ = 828029600.

The previous prime is 1242044389. The next prime is 1242044417. The reversal of 1242044403 is 3044402421.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1242044389) and next prime (1242044417).

It is a cyclic number.

It is not a de Polignac number, because 1242044403 - 2¹⁰ = 1242043379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242044423) 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, 207007398 + ... + 207007403.

It is an arithmetic number, because the mean of its divisors is an integer number (414014802).

Almost surely, 2^1242044403 is an apocalyptic number.

1242044403 is a deficient number, since it is larger than the sum of its proper divisors (414014805).

1242044403 is an equidigital number, since it uses as much as digits as its factorization.

1242044403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414014804.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1242044403 is about 35242.6503401773. The cubic root of 1242044403 is about 1074.9271709810.

Adding to 1242044403 its reverse (3044402421), we get a palindrome (4286446824).

The spelling of 1242044403 in words is "one billion, two hundred forty-two million, forty-four thousand, four hundred three".