102720419 has 4 divisors (see below), whose sum is σ = 102770496. Its totient is φ = 102670344.

The previous prime is 102720383. The next prime is 102720439. The reversal of 102720419 is 914027201.

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 102720419 - 2¹² = 102716323 is a prime.

It is a super-2 number, since 2×102720419² = 21102968959071122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102720439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21824 + ... + 26109.

It is an arithmetic number, because the mean of its divisors is an integer number (25692624).

Almost surely, 2^102720419 is an apocalyptic number.

102720419 is a deficient number, since it is larger than the sum of its proper divisors (50077).

102720419 is an equidigital number, since it uses as much as digits as its factorization.

102720419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50076.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 102720419 is about 10135.1082381985. The cubic root of 102720419 is about 468.3303044204.

The spelling of 102720419 in words is "one hundred two million, seven hundred twenty thousand, four hundred nineteen".