136235421 has 48 divisors (see below), whose sum is σ = 235356160. Its totient is φ = 74299680.

The previous prime is 136235353. The next prime is 136235431. The reversal of 136235421 is 124532631.

136235421 is a `hidden beast` number, since 1 + 3 + 6 + 235 + 421 = 666.

136235421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136235421 - 2⁷ = 136235293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136235431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153846 + ... + 154728.

Almost surely, 2^136235421 is an apocalyptic number.

It is an amenable number.

136235421 is a deficient number, since it is larger than the sum of its proper divisors (99120739).

136235421 is a wasteful number, since it uses less digits than its factorization.

136235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1003 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 136235421 is about 11671.9930174756. The cubic root of 136235421 is about 514.5528792757.

It can be divided in two parts, 13623 and 5421, that added together give a square (19044 = 138²).

The spelling of 136235421 in words is "one hundred thirty-six million, two hundred thirty-five thousand, four hundred twenty-one".