135012551 has 4 divisors (see below), whose sum is σ = 136862112. Its totient is φ = 133162992.

The previous prime is 135012547. The next prime is 135012569. The reversal of 135012551 is 155210531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135012551 - 2² = 135012547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135012151) 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, 924671 + ... + 924816.

It is an arithmetic number, because the mean of its divisors is an integer number (34215528).

Almost surely, 2^135012551 is an apocalyptic number.

135012551 is a deficient number, since it is larger than the sum of its proper divisors (1849561).

135012551 is an equidigital number, since it uses as much as digits as its factorization.

135012551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849560.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 135012551 is about 11619.4901351135. The cubic root of 135012551 is about 513.0086812201.

The spelling of 135012551 in words is "one hundred thirty-five million, twelve thousand, five hundred fifty-one".