121153545 has 24 divisors (see below), whose sum is σ = 214471296. Its totient is φ = 63239328.

The previous prime is 121153541. The next prime is 121153553. The reversal of 121153545 is 545351121.

121153545 is a `hidden beast` number, since 1 + 2 + 115 + 3 + 545 = 666.

It is not a de Polignac number, because 121153545 - 2² = 121153541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121153541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26527 + ... + 30756.

It is an arithmetic number, because the mean of its divisors is an integer number (8936304).

Almost surely, 2^121153545 is an apocalyptic number.

121153545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121153545 is a deficient number, since it is larger than the sum of its proper divisors (93317751).

121153545 is a wasteful number, since it uses less digits than its factorization.

121153545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57341 (or 57338 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 121153545 is about 11006.9771054545. The cubic root of 121153545 is about 494.8178699406.

It can be divided in two parts, 1211 and 53545, that added together give a square (54756 = 234²).

The spelling of 121153545 in words is "one hundred twenty-one million, one hundred fifty-three thousand, five hundred forty-five".