121523664 has 40 divisors (see below), whose sum is σ = 316829920. Its totient is φ = 40134528.

The previous prime is 121523663. The next prime is 121523683. The reversal of 121523664 is 466325121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121523663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6382 + ... + 16845.

It is an arithmetic number, because the mean of its divisors is an integer number (7920748).

Almost surely, 2^121523664 is an apocalyptic number.

It is an amenable number.

121523664 is an abundant number, since it is smaller than the sum of its proper divisors (195306256).

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

121523664 is a wasteful number, since it uses less digits than its factorization.

121523664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23347 (or 23341 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 121523664 is about 11023.7772111015. Note that the first 3 decimals coincide. The cubic root of 121523664 is about 495.3212403112.

Adding to 121523664 its reverse (466325121), we get a palindrome (587848785).

The spelling of 121523664 in words is "one hundred twenty-one million, five hundred twenty-three thousand, six hundred sixty-four".