135525451 has 4 divisors (see below), whose sum is σ = 136792152. Its totient is φ = 134258752.

The previous prime is 135525437. The next prime is 135525503. The reversal of 135525451 is 154525531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154525531 = 43 ⋅3593617.

It is a cyclic number.

It is not a de Polignac number, because 135525451 - 2¹¹ = 135523403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135525421) 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 in 3 ways as a sum of consecutive naturals, for example, 633190 + ... + 633403.

It is an arithmetic number, because the mean of its divisors is an integer number (34198038).

Almost surely, 2^135525451 is an apocalyptic number.

135525451 is a deficient number, since it is larger than the sum of its proper divisors (1266701).

135525451 is a wasteful number, since it uses less digits than its factorization.

135525451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266700.

The product of its digits is 15000, while the sum is 31.

The square root of 135525451 is about 11641.5398895507. The cubic root of 135525451 is about 513.6574842634.

The spelling of 135525451 in words is "one hundred thirty-five million, five hundred twenty-five thousand, four hundred fifty-one".