136225621 has 8 divisors (see below), whose sum is σ = 155784320. Its totient is φ = 116691408.

The previous prime is 136225613. The next prime is 136225633. The reversal of 136225621 is 126522631.

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 136225621 - 2³ = 136225613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136225621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136225121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7975 + ... + 18331.

It is an arithmetic number, because the mean of its divisors is an integer number (19473040).

Almost surely, 2^136225621 is an apocalyptic number.

It is an amenable number.

136225621 is a deficient number, since it is larger than the sum of its proper divisors (19558699).

136225621 is a wasteful number, since it uses less digits than its factorization.

136225621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243.

The product of its digits is 4320, while the sum is 28.

The square root of 136225621 is about 11671.5732015868. The cubic root of 136225621 is about 514.5405409790.

The spelling of 136225621 in words is "one hundred thirty-six million, two hundred twenty-five thousand, six hundred twenty-one".