72072841 has 2 divisors, whose sum is σ = 72072842. Its totient is φ = 72072840.

The previous prime is 72072829. The next prime is 72072857. The reversal of 72072841 is 14827027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60512841 + 11560000 = 7779^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 72072841 - 2⁷ = 72072713 is a prime.

It is a super-2 number, since 2×72072841² = 10388988819622562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72072811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36036420 + 36036421.

It is an arithmetic number, because the mean of its divisors is an integer number (36036421).

Almost surely, 2^72072841 is an apocalyptic number.

It is an amenable number.

72072841 is a deficient number, since it is larger than the sum of its proper divisors (1).

72072841 is an equidigital number, since it uses as much as digits as its factorization.

72072841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 72072841 is about 8489.5724862916. The cubic root of 72072841 is about 416.1570093506.

Adding to 72072841 its reverse (14827027), we get a palindrome (86899868).

The spelling of 72072841 in words is "seventy-two million, seventy-two thousand, eight hundred forty-one".