1421003 has 8 divisors (see below), whose sum is σ = 1462272. Its totient is φ = 1380456.

The previous prime is 1420999. The next prime is 1421011. The reversal of 1421003 is 3001241.

It is a happy number.

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 1421003 - 2² = 1420999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8426 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (182784).

2^1421003 is an apocalyptic number.

1421003 is a deficient number, since it is larger than the sum of its proper divisors (41269).

1421003 is a wasteful number, since it uses less digits than its factorization.

1421003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1421003 is about 1192.0583039432. The cubic root of 1421003 is about 112.4255441494.

Adding to 1421003 its reverse (3001241), we get a palindrome (4422244).

The spelling of 1421003 in words is "one million, four hundred twenty-one thousand, three".