1220002403 has 4 divisors (see below), whose sum is σ = 1220074128. Its totient is φ = 1219930680.

The previous prime is 1220002391. The next prime is 1220002423. The reversal of 1220002403 is 3042000221.

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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220002403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220002423) 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, 5738 + ... + 49728.

It is an arithmetic number, because the mean of its divisors is an integer number (305018532).

Almost surely, 2^1220002403 is an apocalyptic number.

1220002403 is a deficient number, since it is larger than the sum of its proper divisors (71725).

1220002403 is an equidigital number, since it uses as much as digits as its factorization.

1220002403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71724.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1220002403 is about 34928.5327919740. The cubic root of 1220002403 is about 1068.5304316995.

Adding to 1220002403 its reverse (3042000221), we get a palindrome (4262002624).

The spelling of 1220002403 in words is "one billion, two hundred twenty million, two thousand, four hundred three".