121572419 has 2 divisors, whose sum is σ = 121572420. Its totient is φ = 121572418.

The previous prime is 121572397. The next prime is 121572449. The reversal of 121572419 is 914275121.

It is a weak prime.

It is an emirp because it is prime and its reverse (914275121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121572419 - 2¹² = 121568323 is a prime.

It is a super-2 number, since 2×121572419² = 29559706123023122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121572449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60786209 + 60786210.

It is an arithmetic number, because the mean of its divisors is an integer number (60786210).

Almost surely, 2^121572419 is an apocalyptic number.

121572419 is a deficient number, since it is larger than the sum of its proper divisors (1).

121572419 is an equidigital number, since it uses as much as digits as its factorization.

121572419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 121572419 is about 11025.9883457221. The cubic root of 121572419 is about 495.3874720158.

The spelling of 121572419 in words is "one hundred twenty-one million, five hundred seventy-two thousand, four hundred nineteen".