1220451003 has 8 divisors (see below), whose sum is σ = 1808075600. Its totient is φ = 813633984.

The previous prime is 1220450999. The next prime is 1220451053. The reversal of 1220451003 is 3001540221.

It is not a de Polignac number, because 1220451003 - 2² = 1220450999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220451053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22600918 + ... + 22600971.

It is an arithmetic number, because the mean of its divisors is an integer number (226009450).

Almost surely, 2^1220451003 is an apocalyptic number.

1220451003 is a deficient number, since it is larger than the sum of its proper divisors (587624597).

1220451003 is an equidigital number, since it uses as much as digits as its factorization.

1220451003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45201898 (or 45201892 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1220451003 is about 34934.9538857575. The cubic root of 1220451003 is about 1068.6613833573.

Adding to 1220451003 its reverse (3001540221), we get a palindrome (4221991224).

The spelling of 1220451003 in words is "one billion, two hundred twenty million, four hundred fifty-one thousand, three".