121442147 has 4 divisors (see below), whose sum is σ = 121468320. Its totient is φ = 121415976.

The previous prime is 121442107. The next prime is 121442149. The reversal of 121442147 is 741244121.

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 121442147 - 2¹⁶ = 121376611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121442149) 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, 4043 + ... + 16100.

It is an arithmetic number, because the mean of its divisors is an integer number (30367080).

Almost surely, 2^121442147 is an apocalyptic number.

121442147 is a deficient number, since it is larger than the sum of its proper divisors (26173).

121442147 is an equidigital number, since it uses as much as digits as its factorization.

121442147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26172.

The product of its digits is 1792, while the sum is 26.

The square root of 121442147 is about 11020.0792646877. The cubic root of 121442147 is about 495.2104631677.

Adding to 121442147 its reverse (741244121), we get a palindrome (862686268).

The spelling of 121442147 in words is "one hundred twenty-one million, four hundred forty-two thousand, one hundred forty-seven".