121543045 has 16 divisors (see below), whose sum is σ = 160039152. Its totient is φ = 88058880.

The previous prime is 121543027. The next prime is 121543061. The reversal of 121543045 is 540345121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12068676 + 109474369 = 3474^2 + 10463^2 .

It is not a de Polignac number, because 121543045 - 2²⁵ = 87988613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14196 + ... + 21085.

It is an arithmetic number, because the mean of its divisors is an integer number (10002447).

Almost surely, 2^121543045 is an apocalyptic number.

It is an amenable number.

121543045 is a deficient number, since it is larger than the sum of its proper divisors (38496107).

121543045 is a wasteful number, since it uses less digits than its factorization.

121543045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35352.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 121543045 is about 11024.6562304681. The cubic root of 121543045 is about 495.3475707404.

Adding to 121543045 its reverse (540345121), we get a palindrome (661888166).

The spelling of 121543045 in words is "one hundred twenty-one million, five hundred forty-three thousand, forty-five".