72279241 has 4 divisors (see below), whose sum is σ = 74232772. Its totient is φ = 70325712.

The previous prime is 72279209. The next prime is 72279283. The reversal of 72279241 is 14297227.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65545216 + 6734025 = 8096^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 72279241 - 2⁵ = 72279209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72279197 and 72279206.

It is not an unprimeable number, because it can be changed into a prime (72279541) 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 3 ways as a sum of consecutive naturals, for example, 976710 + ... + 976783.

It is an arithmetic number, because the mean of its divisors is an integer number (18558193).

Almost surely, 2^72279241 is an apocalyptic number.

It is an amenable number.

72279241 is a deficient number, since it is larger than the sum of its proper divisors (1953531).

72279241 is a wasteful number, since it uses less digits than its factorization.

72279241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953530.

The product of its digits is 14112, while the sum is 34.

The square root of 72279241 is about 8501.7198848233. The cubic root of 72279241 is about 416.5538899759.

The spelling of 72279241 in words is "seventy-two million, two hundred seventy-nine thousand, two hundred forty-one".