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1003213 = 3792647

1003213 has 4 divisors (see below), whose sum is σ = 1006240. Its totient is φ = 1000188.

The previous prime is 1003201. The next prime is 1003241. The reversal of 1003213 is 3123001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 3-Lehmer number, since φ(1003213) divides (1003213-1)3.

It is a cyclic number.

It is not a de Polignac number, because 1003213 - 217 = 872141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1003213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003273) 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 3 ways as a sum of consecutive naturals, for example, 945 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (251560).

21003213 is an apocalyptic number.

It is an amenable number.

1003213 is a deficient number, since it is larger than the sum of its proper divisors (3027).

1003213 is an equidigital number, since it uses as much as digits as its factorization.

1003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1003213 is about 1001.6052116478. The cubic root of 1003213 is about 100.1069855002.

Adding to 1003213 its reverse (3123001), we get a palindrome (4126214).

The spelling of 1003213 in words is "one million, three thousand, two hundred thirteen".

Divisors: 1 379 2647 1003213