121716425 has 6 divisors (see below), whose sum is σ = 150928398. Its totient is φ = 97373120.

The previous prime is 121716409. The next prime is 121716431. The reversal of 121716425 is 524617121.

It can be written as a sum of positive squares in 3 ways, for example, as 22733824 + 98982601 = 4768^2 + 9949^2 .

It is not a de Polignac number, because 121716425 - 2⁴ = 121716409 is a prime.

It is a super-2 number, since 2×121716425² = 29629776229561250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2434304 + ... + 2434353.

It is an arithmetic number, because the mean of its divisors is an integer number (25154733).

Almost surely, 2^121716425 is an apocalyptic number.

It is an amenable number.

121716425 is a deficient number, since it is larger than the sum of its proper divisors (29211973).

121716425 is an equidigital number, since it uses as much as digits as its factorization.

121716425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868667 (or 4868662 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 121716425 is about 11032.5167119747. The cubic root of 121716425 is about 495.5829950349.

The spelling of 121716425 in words is "one hundred twenty-one million, seven hundred sixteen thousand, four hundred twenty-five".