121605453 has 12 divisors (see below), whose sum is σ = 184897440. Its totient is φ = 76803336.

The previous prime is 121605443. The next prime is 121605457. The reversal of 121605453 is 354506121.

121605453 is a `hidden beast` number, since 1 + 2 + 1 + 605 + 4 + 53 = 666.

It is not a de Polignac number, because 121605453 - 2⁶ = 121605389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121605457) 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 11 ways as a sum of consecutive naturals, for example, 355401 + ... + 355742.

It is an arithmetic number, because the mean of its divisors is an integer number (15408120).

Almost surely, 2^121605453 is an apocalyptic number.

It is an amenable number.

121605453 is a deficient number, since it is larger than the sum of its proper divisors (63291987).

121605453 is a wasteful number, since it uses less digits than its factorization.

121605453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711168 (or 711165 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 121605453 is about 11027.4862502748. The cubic root of 121605453 is about 495.4323373120.

The spelling of 121605453 in words is "one hundred twenty-one million, six hundred five thousand, four hundred fifty-three".