121600725 has 24 divisors (see below), whose sum is σ = 201376992. Its totient is φ = 64747200.

The previous prime is 121600691. The next prime is 121600733. The reversal of 121600725 is 527006121.

It is not a de Polignac number, because 121600725 - 2⁸ = 121600469 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121600695 and 121600704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69714 + ... + 71436.

It is an arithmetic number, because the mean of its divisors is an integer number (8390708).

Almost surely, 2^121600725 is an apocalyptic number.

121600725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121600725 is a deficient number, since it is larger than the sum of its proper divisors (79776267).

121600725 is a wasteful number, since it uses less digits than its factorization.

121600725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 121600725 is about 11027.2718747658. The cubic root of 121600725 is about 495.4259164528.

Adding to 121600725 its reverse (527006121), we get a palindrome (648606846).

The spelling of 121600725 in words is "one hundred twenty-one million, six hundred thousand, seven hundred twenty-five".