121327605 has 32 divisors (see below), whose sum is σ = 246508800. Its totient is φ = 55463616.

The previous prime is 121327603. The next prime is 121327643. The reversal of 121327605 is 506723121.

It is a happy number.

121327605 is a `hidden beast` number, since 1 + 21 + 32 + 7 + 605 = 666.

It is not a de Polignac number, because 121327605 - 2¹ = 121327603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121327603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63250 + ... + 65139.

It is an arithmetic number, because the mean of its divisors is an integer number (7703400).

Almost surely, 2^121327605 is an apocalyptic number.

121327605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121327605 is an abundant number, since it is smaller than the sum of its proper divisors (125181195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121327605 is a wasteful number, since it uses less digits than its factorization.

121327605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128410 (or 128404 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 121327605 is about 11014.8810706244. The cubic root of 121327605 is about 495.0547230593.

The spelling of 121327605 in words is "one hundred twenty-one million, three hundred twenty-seven thousand, six hundred five".