121415345 has 4 divisors (see below), whose sum is σ = 145698420. Its totient is φ = 97132272.

The previous prime is 121415311. The next prime is 121415351. The reversal of 121415345 is 543514121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543514121 = 293 ⋅1854997.

It can be written as a sum of positive squares in 2 ways, for example, as 68939809 + 52475536 = 8303^2 + 7244^2 .

It is a cyclic number.

It is not a de Polignac number, because 121415345 - 2¹² = 121411249 is a prime.

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, 12141530 + ... + 12141539.

It is an arithmetic number, because the mean of its divisors is an integer number (36424605).

Almost surely, 2^121415345 is an apocalyptic number.

It is an amenable number.

121415345 is a deficient number, since it is larger than the sum of its proper divisors (24283075).

121415345 is an equidigital number, since it uses as much as digits as its factorization.

121415345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24283074.

The product of its digits is 2400, while the sum is 26.

The square root of 121415345 is about 11018.8631446261. The cubic root of 121415345 is about 495.1740298873.

Adding to 121415345 its reverse (543514121), we get a palindrome (664929466).

The spelling of 121415345 in words is "one hundred twenty-one million, four hundred fifteen thousand, three hundred forty-five".