121952615 has 4 divisors (see below), whose sum is σ = 146343144. Its totient is φ = 97562088.

The previous prime is 121952609. The next prime is 121952641. The reversal of 121952615 is 516259121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 516259121 = 7 ⋅73751303.

It is a cyclic number.

It is not a de Polignac number, because 121952615 - 2¹⁶ = 121887079 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 3 ways as a sum of consecutive naturals, for example, 12195257 + ... + 12195266.

It is an arithmetic number, because the mean of its divisors is an integer number (36585786).

Almost surely, 2^121952615 is an apocalyptic number.

121952615 is a deficient number, since it is larger than the sum of its proper divisors (24390529).

121952615 is an equidigital number, since it uses as much as digits as its factorization.

121952615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24390528.

The product of its digits is 5400, while the sum is 32.

The square root of 121952615 is about 11043.2157907015. The cubic root of 121952615 is about 495.9033465305.

The spelling of 121952615 in words is "one hundred twenty-one million, nine hundred fifty-two thousand, six hundred fifteen".