103430521 has 4 divisors (see below), whose sum is σ = 103643392. Its totient is φ = 103217652.

The previous prime is 103430497. The next prime is 103430527. The reversal of 103430521 is 125034301.

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: 125034301 = 7 ⋅17862043.

It is a cyclic number.

It is not a de Polignac number, because 103430521 - 2⁵ = 103430489 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103430527) 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, 105705 + ... + 106678.

It is an arithmetic number, because the mean of its divisors is an integer number (25910848).

Almost surely, 2^103430521 is an apocalyptic number.

It is an amenable number.

103430521 is a deficient number, since it is larger than the sum of its proper divisors (212871).

103430521 is an equidigital number, since it uses as much as digits as its factorization.

103430521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212870.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 103430521 is about 10170.0796948697. The cubic root of 103430521 is about 469.4070098081.

Adding to 103430521 its reverse (125034301), we get a palindrome (228464822).

The spelling of 103430521 in words is "one hundred three million, four hundred thirty thousand, five hundred twenty-one".