72641005 has 8 divisors (see below), whose sum is σ = 88814232. Its totient is φ = 57016128.

The previous prime is 72641003. The next prime is 72641011. The reversal of 72641005 is 50014627.

It can be written as a sum of positive squares in 4 ways, for example, as 23794884 + 48846121 = 4878^2 + 6989^2 .

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

It is not a de Polignac number, because 72641005 - 2¹ = 72641003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72641003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136794 + ... + 137323.

It is an arithmetic number, because the mean of its divisors is an integer number (11101779).

Almost surely, 2^72641005 is an apocalyptic number.

It is an amenable number.

72641005 is a deficient number, since it is larger than the sum of its proper divisors (16173227).

72641005 is a wasteful number, since it uses less digits than its factorization.

72641005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274175.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72641005 is about 8522.9692595949. The cubic root of 72641005 is about 417.2476967708.

The spelling of 72641005 in words is "seventy-two million, six hundred forty-one thousand, five".