1212003 has 20 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 745200.

The previous prime is 1211999. The next prime is 1212011. The reversal of 1212003 is 3002121.

It is a happy number.

It is not a de Polignac number, because 1212003 - 2² = 1211999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

1212003 is a Rhonda number in base 8.

1212003 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1212023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 478 + ... + 1628.

2^1212003 is an apocalyptic number.

1212003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1212003 is a deficient number, since it is larger than the sum of its proper divisors (739485).

1212003 is a wasteful number, since it uses less digits than its factorization.

1212003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1212003 is about 1100.9100780718. The cubic root of 1212003 is about 106.6189901951.

Adding to 1212003 its reverse (3002121), we get a palindrome (4214124).

The spelling of 1212003 in words is "one million, two hundred twelve thousand, three".