72276641 has 4 divisors (see below), whose sum is σ = 72457284. Its totient is φ = 72096000.

The previous prime is 72276637. The next prime is 72276661. The reversal of 72276641 is 14667227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14667227 = 1013 ⋅14479.

It can be written as a sum of positive squares in 2 ways, for example, as 37466641 + 34810000 = 6121^2 + 5900^2 .

It is a cyclic number.

It is not a de Polignac number, because 72276641 - 2² = 72276637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72276661) 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, 89720 + ... + 90521.

It is an arithmetic number, because the mean of its divisors is an integer number (18114321).

Almost surely, 2^72276641 is an apocalyptic number.

It is an amenable number.

72276641 is a deficient number, since it is larger than the sum of its proper divisors (180643).

72276641 is a wasteful number, since it uses less digits than its factorization.

72276641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180642.

The product of its digits is 28224, while the sum is 35.

The square root of 72276641 is about 8501.5669732115. The cubic root of 72276641 is about 416.5488952126.

The spelling of 72276641 in words is "seventy-two million, two hundred seventy-six thousand, six hundred forty-one".