121325647 has 4 divisors (see below), whose sum is σ = 125509320. Its totient is φ = 117141976.

The previous prime is 121325569. The next prime is 121325669. The reversal of 121325647 is 746523121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121325647 - 2¹¹ = 121323599 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 (121329647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091793 + ... + 2091850.

It is an arithmetic number, because the mean of its divisors is an integer number (31377330).

Almost surely, 2^121325647 is an apocalyptic number.

121325647 is a deficient number, since it is larger than the sum of its proper divisors (4183673).

121325647 is an equidigital number, since it uses as much as digits as its factorization.

121325647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183672.

The product of its digits is 10080, while the sum is 31.

The square root of 121325647 is about 11014.7921905045. The cubic root of 121325647 is about 495.0520599601.

Adding to 121325647 its reverse (746523121), we get a palindrome (867848768).

The spelling of 121325647 in words is "one hundred twenty-one million, three hundred twenty-five thousand, six hundred forty-seven".