121644501 has 16 divisors (see below), whose sum is σ = 178694208. Its totient is φ = 72992000.

The previous prime is 121644461. The next prime is 121644557. The reversal of 121644501 is 105446121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121644501 - 2¹⁷ = 121513429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121644001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14916 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (11168388).

Almost surely, 2^121644501 is an apocalyptic number.

121644501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121644501 is a deficient number, since it is larger than the sum of its proper divisors (57049707).

121644501 is a wasteful number, since it uses less digits than its factorization.

121644501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36612.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 121644501 is about 11029.2565932614. The cubic root of 121644501 is about 495.4853600757.

The spelling of 121644501 in words is "one hundred twenty-one million, six hundred forty-four thousand, five hundred one".