136121645 has 8 divisors (see below), whose sum is σ = 178195680. Its totient is φ = 98997520.

The previous prime is 136121641. The next prime is 136121663. The reversal of 136121645 is 546121631.

It is a happy number.

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

It is not a de Polignac number, because 136121645 - 2² = 136121641 is a prime.

It is a super-3 number, since 3×136121645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136121641) 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, 1237415 + ... + 1237524.

It is an arithmetic number, because the mean of its divisors is an integer number (22274460).

Almost surely, 2^136121645 is an apocalyptic number.

It is an amenable number.

136121645 is a deficient number, since it is larger than the sum of its proper divisors (42074035).

136121645 is a wasteful number, since it uses less digits than its factorization.

136121645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474955.

The product of its digits is 4320, while the sum is 29.

The square root of 136121645 is about 11667.1181103133. The cubic root of 136121645 is about 514.4095977097.

The spelling of 136121645 in words is "one hundred thirty-six million, one hundred twenty-one thousand, six hundred forty-five".