135725751 has 24 divisors (see below), whose sum is σ = 224733600. Its totient is φ = 77322816.

The previous prime is 135725749. The next prime is 135725767. The reversal of 135725751 is 157527531.

It is a happy number.

135725751 is a `hidden beast` number, since 1 + 357 + 257 + 51 = 666.

It is not a de Polignac number, because 135725751 - 2¹ = 135725749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135725701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18901 + ... + 25073.

It is an arithmetic number, because the mean of its divisors is an integer number (9363900).

Almost surely, 2^135725751 is an apocalyptic number.

135725751 is a deficient number, since it is larger than the sum of its proper divisors (89007849).

135725751 is a wasteful number, since it uses less digits than its factorization.

135725751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535 (or 6532 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 135725751 is about 11650.1395270615. The cubic root of 135725751 is about 513.9104132601.

The spelling of 135725751 in words is "one hundred thirty-five million, seven hundred twenty-five thousand, seven hundred fifty-one".