135634121 has 4 divisors (see below), whose sum is σ = 155010432. Its totient is φ = 116257812.

The previous prime is 135634091. The next prime is 135634123. The reversal of 135634121 is 121436531.

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: 121436531 = 97 ⋅1251923.

It is a cyclic number.

It is not a de Polignac number, because 135634121 - 2¹⁰ = 135633097 is a prime.

It is a super-2 number, since 2×135634121² = 36793229558885282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135634123) 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, 9688145 + ... + 9688158.

It is an arithmetic number, because the mean of its divisors is an integer number (38752608).

Almost surely, 2^135634121 is an apocalyptic number.

It is an amenable number.

135634121 is a deficient number, since it is larger than the sum of its proper divisors (19376311).

135634121 is an equidigital number, since it uses as much as digits as its factorization.

135634121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19376310.

The product of its digits is 2160, while the sum is 26.

The square root of 135634121 is about 11646.2062921794. The cubic root of 135634121 is about 513.7947383010.

The spelling of 135634121 in words is "one hundred thirty-five million, six hundred thirty-four thousand, one hundred twenty-one".