121406125 has 16 divisors (see below), whose sum is σ = 155216880. Its totient is φ = 94752000.

The previous prime is 121406113. The next prime is 121406147. The reversal of 121406125 is 521604121.

It can be written as a sum of positive squares in 8 ways, for example, as 105637284 + 15768841 = 10278^2 + 3971^2 .

It is not a de Polignac number, because 121406125 - 2¹¹ = 121404077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121406096 and 121406105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6720 + ... + 16969.

It is an arithmetic number, because the mean of its divisors is an integer number (9701055).

Almost surely, 2^121406125 is an apocalyptic number.

It is an amenable number.

121406125 is a deficient number, since it is larger than the sum of its proper divisors (33810755).

121406125 is an equidigital number, since it uses as much as digits as its factorization.

121406125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23745 (or 23735 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121406125 is about 11018.4447632141. Note that the first 3 decimals coincide. The cubic root of 121406125 is about 495.1614954472.

The spelling of 121406125 in words is "one hundred twenty-one million, four hundred six thousand, one hundred twenty-five".