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103021 = 711451

103021 has 4 divisors (see below), whose sum is σ = 104544. Its totient is φ = 101500.

The previous prime is 103007. The next prime is 103043. The reversal of 103021 is 120301.

Adding to 103021 its reverse (120301), we get a palindrome (223322).

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, and also an emirpimes, since its reverse is a distinct semiprime: 120301 = 592039.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-103021 is a prime.

It is a super-2 number, since 2×1030212 = 21226652882, which contains 22 as substring.

It is a Duffinian number.

103021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 102995 and 103013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (26136).

2103021 is an apocalyptic number.

It is an amenable number.

103021 is a deficient number, since it is larger than the sum of its proper divisors (1523).

103021 is an equidigital number, since it uses as much as digits as its factorization.

103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 103021 is about 320.9688458402. The cubic root of 103021 is about 46.8786669724.

The spelling of 103021 in words is "one hundred three thousand, twenty-one", and thus it is an iban number.

Divisors: 1 71 1451 103021