121545040 has 20 divisors (see below), whose sum is σ = 282592404. Its totient is φ = 48617984.

The previous prime is 121545029. The next prime is 121545043. The reversal of 121545040 is 40545121.

It can be written as a sum of positive squares in 2 ways, for example, as 24561936 + 96983104 = 4956^2 + 9848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759577 + ... + 759736.

Almost surely, 2^121545040 is an apocalyptic number.

121545040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121545040 is an abundant number, since it is smaller than the sum of its proper divisors (161047364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121545040 is a wasteful number, since it uses less digits than its factorization.

121545040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519326 (or 1519320 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121545040 is about 11024.7467091086. The cubic root of 121545040 is about 495.3502809270.

The spelling of 121545040 in words is "one hundred twenty-one million, five hundred forty-five thousand, forty".