121043725 has 12 divisors (see below), whose sum is σ = 163739520. Its totient is φ = 88031600.

The previous prime is 121043719. The next prime is 121043729. The reversal of 121043725 is 527340121.

It is a happy number.

It is not a de Polignac number, because 121043725 - 2³ = 121043717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 121043725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121043729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219805 + ... + 220354.

It is an arithmetic number, because the mean of its divisors is an integer number (13644960).

Almost surely, 2^121043725 is an apocalyptic number.

It is an amenable number.

121043725 is a deficient number, since it is larger than the sum of its proper divisors (42695795).

121043725 is a wasteful number, since it uses less digits than its factorization.

121043725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440180 (or 440175 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 121043725 is about 11001.9873204799. The cubic root of 121043725 is about 494.6683150214.

Adding to 121043725 its reverse (527340121), we get a palindrome (648383846).

The spelling of 121043725 in words is "one hundred twenty-one million, forty-three thousand, seven hundred twenty-five".