135395251 has 4 divisors (see below), whose sum is σ = 136709872. Its totient is φ = 134080632.

The previous prime is 135395237. The next prime is 135395263. The reversal of 135395251 is 152593531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152593531 = 2971 ⋅51361.

It is a cyclic number.

It is not a de Polignac number, because 135395251 - 2¹⁷ = 135264179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135395201) 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, 657156 + ... + 657361.

It is an arithmetic number, because the mean of its divisors is an integer number (34177468).

Almost surely, 2^135395251 is an apocalyptic number.

135395251 is a deficient number, since it is larger than the sum of its proper divisors (1314621).

135395251 is a wasteful number, since it uses less digits than its factorization.

135395251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314620.

The product of its digits is 20250, while the sum is 34.

The square root of 135395251 is about 11635.9465021115. The cubic root of 135395251 is about 513.4929404276.

The spelling of 135395251 in words is "one hundred thirty-five million, three hundred ninety-five thousand, two hundred fifty-one".