135133421 has 2 divisors, whose sum is σ = 135133422. Its totient is φ = 135133420.

The previous prime is 135133399. The next prime is 135133447. The reversal of 135133421 is 124331531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99301225 + 35832196 = 9965^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 135133421 - 2¹⁰ = 135132397 is a prime.

It is a super-2 number, since 2×135133421² = 36522082942326482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135133451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67566710 + 67566711.

It is an arithmetic number, because the mean of its divisors is an integer number (67566711).

Almost surely, 2^135133421 is an apocalyptic number.

It is an amenable number.

135133421 is a deficient number, since it is larger than the sum of its proper divisors (1).

135133421 is an equidigital number, since it uses as much as digits as its factorization.

135133421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 135133421 is about 11624.6901464082. The cubic root of 135133421 is about 513.1617259161.

Adding to 135133421 its reverse (124331531), we get a palindrome (259464952).

The spelling of 135133421 in words is "one hundred thirty-five million, one hundred thirty-three thousand, four hundred twenty-one".