103513421 has 4 divisors (see below), whose sum is σ = 112923744. Its totient is φ = 94103100.

The previous prime is 103513379. The next prime is 103513471. The reversal of 103513421 is 124315301.

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 cyclic number.

It is not a de Polignac number, because 103513421 - 2¹⁸ = 103251277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103513393 and 103513402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103513471) 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, 4705145 + ... + 4705166.

It is an arithmetic number, because the mean of its divisors is an integer number (28230936).

Almost surely, 2^103513421 is an apocalyptic number.

103513421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103513421 is a deficient number, since it is larger than the sum of its proper divisors (9410323).

103513421 is an equidigital number, since it uses as much as digits as its factorization.

103513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9410322.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 103513421 is about 10174.1545594708. The cubic root of 103513421 is about 469.5323868852.

Adding to 103513421 its reverse (124315301), we get a palindrome (227828722).

The spelling of 103513421 in words is "one hundred three million, five hundred thirteen thousand, four hundred twenty-one".