135720435 has 32 divisors (see below), whose sum is σ = 237867840. Its totient is φ = 65773568.

The previous prime is 135720433. The next prime is 135720437. The reversal of 135720435 is 534027531.

It is an interprime number because it is at equal distance from previous prime (135720433) and next prime (135720437).

It is a cyclic number.

It is not a de Polignac number, because 135720435 - 2¹ = 135720433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135720433) 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, 1782 + ... + 16571.

It is an arithmetic number, because the mean of its divisors is an integer number (7433370).

Almost surely, 2^135720435 is an apocalyptic number.

135720435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135720435 is a deficient number, since it is larger than the sum of its proper divisors (102147405).

135720435 is a wasteful number, since it uses less digits than its factorization.

135720435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18407.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 135720435 is about 11649.9113730534. The cubic root of 135720435 is about 513.9037036922.

Adding to 135720435 its reverse (534027531), we get a palindrome (669747966).

The spelling of 135720435 in words is "one hundred thirty-five million, seven hundred twenty thousand, four hundred thirty-five".