103021385 has 4 divisors (see below), whose sum is σ = 123625668. Its totient is φ = 82417104.

The previous prime is 103021367. The next prime is 103021403. The reversal of 103021385 is 583120301.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (103021367) and next prime (103021403).

It can be written as a sum of positive squares in 2 ways, for example, as 74580496 + 28440889 = 8636^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 103021385 - 2²⁶ = 35912521 is a prime.

It is a super-3 number, since 3×103021385³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 103021385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10302134 + ... + 10302143.

It is an arithmetic number, because the mean of its divisors is an integer number (30906417).

Almost surely, 2^103021385 is an apocalyptic number.

It is an amenable number.

103021385 is a deficient number, since it is larger than the sum of its proper divisors (20604283).

103021385 is an equidigital number, since it uses as much as digits as its factorization.

103021385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20604282.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 103021385 is about 10149.9450737430. The cubic root of 103021385 is about 468.7872536911.

Adding to 103021385 its reverse (583120301), we get a palindrome (686141686).

The spelling of 103021385 in words is "one hundred three million, twenty-one thousand, three hundred eighty-five".