121532045 has 4 divisors (see below), whose sum is σ = 145838460. Its totient is φ = 97225632.

The previous prime is 121532041. The next prime is 121532053. The reversal of 121532045 is 540235121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540235121 = 269 ⋅2008309.

It can be written as a sum of positive squares in 2 ways, for example, as 80802121 + 40729924 = 8989^2 + 6382^2 .

It is a cyclic number.

It is not a de Polignac number, because 121532045 - 2² = 121532041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121532045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532041) 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 3 ways as a sum of consecutive naturals, for example, 12153200 + ... + 12153209.

It is an arithmetic number, because the mean of its divisors is an integer number (36459615).

Almost surely, 2^121532045 is an apocalyptic number.

It is an amenable number.

121532045 is a deficient number, since it is larger than the sum of its proper divisors (24306415).

121532045 is an equidigital number, since it uses as much as digits as its factorization.

121532045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24306414.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 121532045 is about 11024.1573374113. The cubic root of 121532045 is about 495.3326268230.

Adding to 121532045 its reverse (540235121), we get a palindrome (661767166).

The spelling of 121532045 in words is "one hundred twenty-one million, five hundred thirty-two thousand, forty-five".