121242453 has 32 divisors (see below), whose sum is σ = 183036672. Its totient is φ = 70963200.

The previous prime is 121242437. The next prime is 121242461. The reversal of 121242453 is 354242121.

It is not a de Polignac number, because 121242453 - 2⁴ = 121242437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121246453) 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 31 ways as a sum of consecutive naturals, for example, 46833 + ... + 49353.

It is an arithmetic number, because the mean of its divisors is an integer number (5719896).

Almost surely, 2^121242453 is an apocalyptic number.

It is an amenable number.

121242453 is a deficient number, since it is larger than the sum of its proper divisors (61794219).

121242453 is a wasteful number, since it uses less digits than its factorization.

121242453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605.

The product of its digits is 1920, while the sum is 24.

The square root of 121242453 is about 11011.0150758229. The cubic root of 121242453 is about 494.9388803222.

Adding to 121242453 its reverse (354242121), we get a palindrome (475484574).

The spelling of 121242453 in words is "one hundred twenty-one million, two hundred forty-two thousand, four hundred fifty-three".