1242222403 has 4 divisors (see below), whose sum is σ = 1263277080. Its totient is φ = 1221167728.

The previous prime is 1242222391. The next prime is 1242222437. The reversal of 1242222403 is 3042222421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3042222421 = 7 ⋅434603203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242222403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242222473) 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, 10527250 + ... + 10527367.

It is an arithmetic number, because the mean of its divisors is an integer number (315819270).

Almost surely, 2^1242222403 is an apocalyptic number.

1242222403 is a deficient number, since it is larger than the sum of its proper divisors (21054677).

1242222403 is an equidigital number, since it uses as much as digits as its factorization.

1242222403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054676.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1242222403 is about 35245.1755989384. The cubic root of 1242222403 is about 1074.9785185540.

Adding to 1242222403 its reverse (3042222421), we get a palindrome (4284444824).

The spelling of 1242222403 in words is "one billion, two hundred forty-two million, two hundred twenty-two thousand, four hundred three".