121582799 has 16 divisors (see below), whose sum is σ = 133316064. Its totient is φ = 110208000.

The previous prime is 121582771. The next prime is 121582829. The reversal of 121582799 is 997285121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121582799 - 2²⁰ = 120534223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121585799) 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, 302999 + ... + 303399.

It is an arithmetic number, because the mean of its divisors is an integer number (8332254).

Almost surely, 2^121582799 is an apocalyptic number.

121582799 is a deficient number, since it is larger than the sum of its proper divisors (11733265).

121582799 is a wasteful number, since it uses less digits than its factorization.

121582799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its digits is 90720, while the sum is 44.

The square root of 121582799 is about 11026.4590417776. The cubic root of 121582799 is about 495.4015705415.

The spelling of 121582799 in words is "one hundred twenty-one million, five hundred eighty-two thousand, seven hundred ninety-nine".