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136441 = 472903

136441 has 4 divisors (see below), whose sum is σ = 139392. Its totient is φ = 133492.

The previous prime is 136429. The next prime is 136447. The reversal of 136441 is 144631.

It is a happy number.

136441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144631 = 612371.

It is a cyclic number.

It is not a de Polignac number, because 136441 - 29 = 135929 is a prime.

It is a super-2 number, since 2×1364412 = 37232292962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136447) 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, 1405 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (34848).

2136441 is an apocalyptic number.

It is an amenable number.

136441 is a deficient number, since it is larger than the sum of its proper divisors (2951).

136441 is an equidigital number, since it uses as much as digits as its factorization.

136441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950.

The product of its digits is 288, while the sum is 19.

The square root of 136441 is about 369.3792089439. The cubic root of 136441 is about 51.4811568982.

The spelling of 136441 in words is "one hundred thirty-six thousand, four hundred forty-one".

Divisors: 1 47 2903 136441