72102419 has 4 divisors (see below), whose sum is σ = 73462896. Its totient is φ = 70741944.

The previous prime is 72102413. The next prime is 72102449. The reversal of 72102419 is 91420127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91420127 = 487 ⋅187721.

It is a cyclic number.

It is not a de Polignac number, because 72102419 - 2⁴ = 72102403 is a prime.

It is a super-2 number, since 2×72102419² = 10397517651303122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72102413) 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, 680159 + ... + 680264.

It is an arithmetic number, because the mean of its divisors is an integer number (18365724).

Almost surely, 2^72102419 is an apocalyptic number.

72102419 is a deficient number, since it is larger than the sum of its proper divisors (1360477).

72102419 is a wasteful number, since it uses less digits than its factorization.

72102419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360476.

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

The square root of 72102419 is about 8491.3143270050. The cubic root of 72102419 is about 416.2139305079.

The spelling of 72102419 in words is "seventy-two million, one hundred two thousand, four hundred nineteen".