135103421 has 2 divisors, whose sum is σ = 135103422. Its totient is φ = 135103420.

The previous prime is 135103417. The next prime is 135103439. The reversal of 135103421 is 124301531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94284100 + 40819321 = 9710^2 + 6389^2 .

It is a cyclic number.

It is not a de Polignac number, because 135103421 - 2² = 135103417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135103393 and 135103402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135103411) 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 as a sum of consecutive naturals, namely, 67551710 + 67551711.

It is an arithmetic number, because the mean of its divisors is an integer number (67551711).

Almost surely, 2^135103421 is an apocalyptic number.

It is an amenable number.

135103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

135103421 is an equidigital number, since it uses as much as digits as its factorization.

135103421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 135103421 is about 11623.3997178106. The cubic root of 135103421 is about 513.1237486562.

Adding to 135103421 its reverse (124301531), we get a palindrome (259404952).

The spelling of 135103421 in words is "one hundred thirty-five million, one hundred three thousand, four hundred twenty-one".