121645053 has 12 divisors (see below), whose sum is σ = 181768860. Its totient is φ = 78300096.

The previous prime is 121645037. The next prime is 121645057. The reversal of 121645053 is 350546121.

121645053 is a `hidden beast` number, since 12 + 1 + 645 + 0 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92679129 + 28965924 = 9627^2 + 5382^2 .

It is not a de Polignac number, because 121645053 - 2⁴ = 121645037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121645057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232776 + ... + 233297.

It is an arithmetic number, because the mean of its divisors is an integer number (15147405).

Almost surely, 2^121645053 is an apocalyptic number.

It is an amenable number.

121645053 is a deficient number, since it is larger than the sum of its proper divisors (60123807).

121645053 is a wasteful number, since it uses less digits than its factorization.

121645053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466108 (or 466105 counting only the distinct ones).

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

The square root of 121645053 is about 11029.2816175851. The cubic root of 121645053 is about 495.4861095479.

The spelling of 121645053 in words is "one hundred twenty-one million, six hundred forty-five thousand, fifty-three".