1212403 has 8 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 1155840.

The previous prime is 1212401. The next prime is 1212427. The reversal of 1212403 is 3042121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212403 - 2¹ = 1212401 is a prime.

It is a Duffinian number.

1212403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1212401) 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, 2598 + ... + 3028.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

2^1212403 is an apocalyptic number.

1212403 is a deficient number, since it is larger than the sum of its proper divisors (57677).

1212403 is an equidigital number, since it uses as much as digits as its factorization.

1212403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1212403 is about 1101.0917309652. The cubic root of 1212403 is about 106.6307181378.

Adding to 1212403 its reverse (3042121), we get a palindrome (4254524).

The spelling of 1212403 in words is "one million, two hundred twelve thousand, four hundred three".