1242403203 has 4 divisors (see below), whose sum is σ = 1656537608. Its totient is φ = 828268800.

The previous prime is 1242403199. The next prime is 1242403207. The reversal of 1242403203 is 3023042421.

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 (1242403199) and next prime (1242403207).

It is not a de Polignac number, because 1242403203 - 2² = 1242403199 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 1242403203.

It is not an unprimeable number, because it can be changed into a prime (1242403207) 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, 207067198 + ... + 207067203.

It is an arithmetic number, because the mean of its divisors is an integer number (414134402).

Almost surely, 2^1242403203 is an apocalyptic number.

1242403203 is a deficient number, since it is larger than the sum of its proper divisors (414134405).

1242403203 is an equidigital number, since it uses as much as digits as its factorization.

1242403203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414134404.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1242403203 is about 35247.7403956622. The cubic root of 1242403203 is about 1075.0306688204.

Adding to 1242403203 its reverse (3023042421), we get a palindrome (4265445624).

The spelling of 1242403203 in words is "one billion, two hundred forty-two million, four hundred three thousand, two hundred three".