72151061 has 2 divisors, whose sum is σ = 72151062. Its totient is φ = 72151060.

The previous prime is 72151039. The next prime is 72151087. The reversal of 72151061 is 16015127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 3025 = 8494^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 72151061 - 2⁶ = 72150997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72151031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36075530 + 36075531.

It is an arithmetic number, because the mean of its divisors is an integer number (36075531).

Almost surely, 2^72151061 is an apocalyptic number.

It is an amenable number.

72151061 is a deficient number, since it is larger than the sum of its proper divisors (1).

72151061 is an equidigital number, since it uses as much as digits as its factorization.

72151061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 72151061 is about 8494.1780650043. The cubic root of 72151061 is about 416.3075053944.

Adding to 72151061 its reverse (16015127), we get a palindrome (88166188).

The spelling of 72151061 in words is "seventy-two million, one hundred fifty-one thousand, sixty-one".