121442642 has 32 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 55641600.

The previous prime is 121442641. The next prime is 121442647. The reversal of 121442642 is 246244121.

It is not an unprimeable number, because it can be changed into a prime (121442641) 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 15 ways as a sum of consecutive naturals, for example, 172892 + ... + 173592.

It is an arithmetic number, because the mean of its divisors is an integer number (6191640).

Almost surely, 2^121442642 is an apocalyptic number.

121442642 is a deficient number, since it is larger than the sum of its proper divisors (76689838).

121442642 is a wasteful number, since it uses less digits than its factorization.

121442642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its digits is 3072, while the sum is 26.

The square root of 121442642 is about 11020.1017236684. The cubic root of 121442642 is about 495.2111359952.

Adding to 121442642 its reverse (246244121), we get a palindrome (367686763).

The spelling of 121442642 in words is "one hundred twenty-one million, four hundred forty-two thousand, six hundred forty-two".