121045615 has 4 divisors (see below), whose sum is σ = 145254744. Its totient is φ = 96836488.

The previous prime is 121045601. The next prime is 121045649. The reversal of 121045615 is 516540121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121045615 - 2⁹ = 121045103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121045615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12104557 + ... + 12104566.

It is an arithmetic number, because the mean of its divisors is an integer number (36313686).

Almost surely, 2^121045615 is an apocalyptic number.

121045615 is a deficient number, since it is larger than the sum of its proper divisors (24209129).

121045615 is an equidigital number, since it uses as much as digits as its factorization.

121045615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24209128.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121045615 is about 11002.0732137175. The cubic root of 121045615 is about 494.6708896234.

Adding to 121045615 its reverse (516540121), we get a palindrome (637585736).

The spelling of 121045615 in words is "one hundred twenty-one million, forty-five thousand, six hundred fifteen".