121403125 has 24 divisors (see below), whose sum is σ = 154818216. Its totient is φ = 95160000.

The previous prime is 121403119. The next prime is 121403153. The reversal of 121403125 is 521304121.

It can be written as a sum of positive squares in 12 ways, for example, as 96393124 + 25010001 = 9818^2 + 5001^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121403125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165259 + ... + 165991.

It is an arithmetic number, because the mean of its divisors is an integer number (6450759).

Almost surely, 2^121403125 is an apocalyptic number.

It is an amenable number.

121403125 is a deficient number, since it is larger than the sum of its proper divisors (33415091).

121403125 is an frugal number, since it uses more digits than its factorization.

121403125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121403125 is about 11018.3086270080. The cubic root of 121403125 is about 495.1574168591.

Adding to 121403125 its reverse (521304121), we get a palindrome (642707246).

The spelling of 121403125 in words is "one hundred twenty-one million, four hundred three thousand, one hundred twenty-five".