136029521 has 4 divisors (see below), whose sum is σ = 141943872. Its totient is φ = 130115172.

The previous prime is 136029503. The next prime is 136029533. The reversal of 136029521 is 125920631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136029521 - 2¹⁸ = 135767377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136029821) 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, 2957141 + ... + 2957186.

It is an arithmetic number, because the mean of its divisors is an integer number (35485968).

Almost surely, 2^136029521 is an apocalyptic number.

It is an amenable number.

136029521 is a deficient number, since it is larger than the sum of its proper divisors (5914351).

136029521 is an equidigital number, since it uses as much as digits as its factorization.

136029521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914350.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 136029521 is about 11663.1694234458. The cubic root of 136029521 is about 514.2935246573.

The spelling of 136029521 in words is "one hundred thirty-six million, twenty-nine thousand, five hundred twenty-one".