121243453 has 4 divisors (see below), whose sum is σ = 121859100. Its totient is φ = 120627808.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243453 is 354342121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91355364 + 29888089 = 9558^2 + 5467^2 .

It is a cyclic number.

It is not a de Polignac number, because 121243453 - 2⁹ = 121242941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307528 + ... + 307921.

It is an arithmetic number, because the mean of its divisors is an integer number (30464775).

Almost surely, 2^121243453 is an apocalyptic number.

It is an amenable number.

121243453 is a deficient number, since it is larger than the sum of its proper divisors (615647).

121243453 is an equidigital number, since it uses as much as digits as its factorization.

121243453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615646.

The product of its digits is 2880, while the sum is 25.

The square root of 121243453 is about 11011.0604848035. The cubic root of 121243453 is about 494.9402410599.

Adding to 121243453 its reverse (354342121), we get a palindrome (475585574).

The spelling of 121243453 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred fifty-three".