72171041 has 2 divisors, whose sum is σ = 72171042. Its totient is φ = 72171040.

The previous prime is 72171037. The next prime is 72171061. The reversal of 72171041 is 14017127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70896400 + 1274641 = 8420^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 72171041 - 2² = 72171037 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72170998 and 72171016.

It is not a weakly prime, because it can be changed into another prime (72171061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36085520 + 36085521.

It is an arithmetic number, because the mean of its divisors is an integer number (36085521).

Almost surely, 2^72171041 is an apocalyptic number.

It is an amenable number.

72171041 is a deficient number, since it is larger than the sum of its proper divisors (1).

72171041 is an equidigital number, since it uses as much as digits as its factorization.

72171041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 72171041 is about 8495.3540832622. The cubic root of 72171041 is about 416.3459296678.

Adding to 72171041 its reverse (14017127), we get a palindrome (86188168).

The spelling of 72171041 in words is "seventy-two million, one hundred seventy-one thousand, forty-one".