121564453 has 8 divisors (see below), whose sum is σ = 127122048. Its totient is φ = 116029584.

The previous prime is 121564447. The next prime is 121564493. The reversal of 121564453 is 354465121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121564453 - 2⁹ = 121563941 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 (121564493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5775 + ... + 16627.

It is an arithmetic number, because the mean of its divisors is an integer number (15890256).

Almost surely, 2^121564453 is an apocalyptic number.

It is an amenable number.

121564453 is a deficient number, since it is larger than the sum of its proper divisors (5557595).

121564453 is a wasteful number, since it uses less digits than its factorization.

121564453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11363.

The product of its digits is 14400, while the sum is 31.

The square root of 121564453 is about 11025.6271023466. The cubic root of 121564453 is about 495.3766517359.

The spelling of 121564453 in words is "one hundred twenty-one million, five hundred sixty-four thousand, four hundred fifty-three".