121915741 has 4 divisors (see below), whose sum is σ = 124216092. Its totient is φ = 119615392.

The previous prime is 121915727. The next prime is 121915747. The reversal of 121915741 is 147519121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55428025 + 66487716 = 7445^2 + 8154^2 .

It is a cyclic number.

It is not a de Polignac number, because 121915741 - 2⁷ = 121915613 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121915747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150096 + ... + 1150201.

It is an arithmetic number, because the mean of its divisors is an integer number (31054023).

Almost surely, 2^121915741 is an apocalyptic number.

It is an amenable number.

121915741 is a deficient number, since it is larger than the sum of its proper divisors (2300351).

121915741 is an equidigital number, since it uses as much as digits as its factorization.

121915741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300350.

The product of its digits is 2520, while the sum is 31.

The square root of 121915741 is about 11041.5461326754. The cubic root of 121915741 is about 495.8533604948.

The spelling of 121915741 in words is "one hundred twenty-one million, nine hundred fifteen thousand, seven hundred forty-one".