135127251 has 32 divisors (see below), whose sum is σ = 233472000. Its totient is φ = 77210280.

The previous prime is 135127243. The next prime is 135127253. The reversal of 135127251 is 152721531.

It is not a de Polignac number, because 135127251 - 2³ = 135127243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (135127253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1966 + ... + 16556.

It is an arithmetic number, because the mean of its divisors is an integer number (7296000).

Almost surely, 2^135127251 is an apocalyptic number.

135127251 is a deficient number, since it is larger than the sum of its proper divisors (98344749).

135127251 is an equidigital number, since it uses as much as digits as its factorization.

135127251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14621 (or 14601 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 135127251 is about 11624.4247599612. The cubic root of 135127251 is about 513.1539157188.

Adding to 135127251 its reverse (152721531), we get a palindrome (287848782).

The spelling of 135127251 in words is "one hundred thirty-five million, one hundred twenty-seven thousand, two hundred fifty-one".