121642454 has 8 divisors (see below), whose sum is σ = 185033808. Its totient is φ = 59964520.

The previous prime is 121642397. The next prime is 121642459. The reversal of 121642454 is 454246121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121642459) 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 3 ways as a sum of consecutive naturals, for example, 428177 + ... + 428460.

It is an arithmetic number, because the mean of its divisors is an integer number (23129226).

Almost surely, 2^121642454 is an apocalyptic number.

121642454 is a deficient number, since it is larger than the sum of its proper divisors (63391354).

121642454 is an equidigital number, since it uses as much as digits as its factorization.

121642454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856710.

The product of its digits is 7680, while the sum is 29.

The square root of 121642454 is about 11029.1637942321. The cubic root of 121642454 is about 495.4825807633.

Adding to 121642454 its reverse (454246121), we get a palindrome (575888575).

The spelling of 121642454 in words is "one hundred twenty-one million, six hundred forty-two thousand, four hundred fifty-four".