121654042 has 4 divisors (see below), whose sum is σ = 182481066. Its totient is φ = 60827020.

The previous prime is 121654033. The next prime is 121654063. The reversal of 121654042 is 240456121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240456121 = 619 ⋅388459.

It can be written as a sum of positive squares in only one way, i.e., 110019121 + 11634921 = 10489^2 + 3411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121653998 and 121654016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30413509 + ... + 30413512.

Almost surely, 2^121654042 is an apocalyptic number.

121654042 is a deficient number, since it is larger than the sum of its proper divisors (60827024).

121654042 is an equidigital number, since it uses as much as digits as its factorization.

121654042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60827023.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 121654042 is about 11029.6891161991. The cubic root of 121654042 is about 495.4983139487.

The spelling of 121654042 in words is "one hundred twenty-one million, six hundred fifty-four thousand, forty-two".