136406401 has 8 divisors (see below), whose sum is σ = 141402600. Its totient is φ = 131429760.

The previous prime is 136406381. The next prime is 136406411. The reversal of 136406401 is 104604631.

It can be written as a sum of positive squares in 4 ways, for example, as 85655025 + 50751376 = 9255^2 + 7124^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 136406401 - 2²⁷ = 2188673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136406411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10141 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (17675325).

Almost surely, 2^136406401 is an apocalyptic number.

It is an amenable number.

136406401 is a deficient number, since it is larger than the sum of its proper divisors (4996199).

136406401 is an equidigital number, since it uses as much as digits as its factorization.

136406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9779.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 136406401 is about 11679.3150912200. The cubic root of 136406401 is about 514.7680496308.

The spelling of 136406401 in words is "one hundred thirty-six million, four hundred six thousand, four hundred one".