135642157 has 8 divisors (see below), whose sum is σ = 155639232. Its totient is φ = 115800000.

The previous prime is 135642151. The next prime is 135642161. The reversal of 135642157 is 751246531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135642157 is a prime.

It is a super-2 number, since 2×135642157² = 36797589511225298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135642151) 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 7 ways as a sum of consecutive naturals, for example, 36844 + ... + 40357.

It is an arithmetic number, because the mean of its divisors is an integer number (19454904).

Almost surely, 2^135642157 is an apocalyptic number.

It is an amenable number.

135642157 is a deficient number, since it is larger than the sum of its proper divisors (19997075).

135642157 is an equidigital number, since it uses as much as digits as its factorization.

135642157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77459.

The product of its digits is 25200, while the sum is 34.

The square root of 135642157 is about 11646.5512921208. The cubic root of 135642157 is about 513.8048851406.

Adding to 135642157 its reverse (751246531), we get a palindrome (886888688).

The spelling of 135642157 in words is "one hundred thirty-five million, six hundred forty-two thousand, one hundred fifty-seven".