72080401 has 2 divisors, whose sum is σ = 72080402. Its totient is φ = 72080400.

The previous prime is 72080381. The next prime is 72080429. The reversal of 72080401 is 10408027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54774801 + 17305600 = 7401^2 + 4160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72080401 is a prime.

It is not a weakly prime, because it can be changed into another prime (72080431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36040200 + 36040201.

It is an arithmetic number, because the mean of its divisors is an integer number (36040201).

Almost surely, 2^72080401 is an apocalyptic number.

It is an amenable number.

72080401 is a deficient number, since it is larger than the sum of its proper divisors (1).

72080401 is an equidigital number, since it uses as much as digits as its factorization.

72080401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 72080401 is about 8490.0177267188. The cubic root of 72080401 is about 416.1715596164.

Adding to 72080401 its reverse (10408027), we get a palindrome (82488428).

The spelling of 72080401 in words is "seventy-two million, eighty thousand, four hundred one".