121454638 has 4 divisors (see below), whose sum is σ = 182181960. Its totient is φ = 60727318.

The previous prime is 121454617. The next prime is 121454657. The reversal of 121454638 is 836454121.

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

It is a super-2 number, since 2×121454638² = 29502458183422088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30363658 + ... + 30363661.

It is an arithmetic number, because the mean of its divisors is an integer number (45545490).

Almost surely, 2^121454638 is an apocalyptic number.

121454638 is a deficient number, since it is larger than the sum of its proper divisors (60727322).

121454638 is an equidigital number, since it uses as much as digits as its factorization.

121454638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60727321.

The product of its digits is 23040, while the sum is 34.

The square root of 121454638 is about 11020.6459883257. The cubic root of 121454638 is about 495.2274409687.

The spelling of 121454638 in words is "one hundred twenty-one million, four hundred fifty-four thousand, six hundred thirty-eight".