72545419 has 8 divisors (see below), whose sum is σ = 74899520. Its totient is φ = 70212096.

The previous prime is 72545399. The next prime is 72545449. The reversal of 72545419 is 91454527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72545419 - 2¹⁵ = 72512651 is a prime.

It is a super-2 number, since 2×72545419² = 10525675635771122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72545449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062 + ... + 12220.

It is an arithmetic number, because the mean of its divisors is an integer number (9362440).

Almost surely, 2^72545419 is an apocalyptic number.

72545419 is the 4918-th hex number.

72545419 is a deficient number, since it is larger than the sum of its proper divisors (2354101).

72545419 is a wasteful number, since it uses less digits than its factorization.

72545419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10389.

The product of its digits is 50400, while the sum is 37.

The square root of 72545419 is about 8517.3598608959. The cubic root of 72545419 is about 417.0646020905.

The spelling of 72545419 in words is "seventy-two million, five hundred forty-five thousand, four hundred nineteen".