72245245 has 8 divisors (see below), whose sum is σ = 87174360. Its totient is φ = 57476160.

The previous prime is 72245233. The next prime is 72245267. The reversal of 72245245 is 54254227.

It can be written as a sum of positive squares in 4 ways, for example, as 29241 + 72216004 = 171^2 + 8498^2 .

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

It is not a de Polignac number, because 72245245 - 2¹⁵ = 72212477 is a prime.

It is a super-2 number, since 2×72245245² = 10438750850220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39010 + ... + 40819.

It is an arithmetic number, because the mean of its divisors is an integer number (10896795).

Almost surely, 2^72245245 is an apocalyptic number.

It is an amenable number.

72245245 is a deficient number, since it is larger than the sum of its proper divisors (14929115).

72245245 is a wasteful number, since it uses less digits than its factorization.

72245245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80015.

The product of its digits is 22400, while the sum is 31.

The square root of 72245245 is about 8499.7202895154. The cubic root of 72245245 is about 416.4885720662.

The spelling of 72245245 in words is "seventy-two million, two hundred forty-five thousand, two hundred forty-five".