1507172081 has 2 divisors, whose sum is σ = 1507172082. Its totient is φ = 1507172080.

The previous prime is 1507172057. The next prime is 1507172113. The reversal of 1507172081 is 1802717051.

It is an a-pointer prime, because the next prime (1507172113) can be obtained adding 1507172081 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1488725056 + 18447025 = 38584^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1507172081 - 2¹⁴ = 1507155697 is a prime.

It is a super-2 number, since 2×1507172081² = 4543135363491741122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1507172011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 753586040 + 753586041.

It is an arithmetic number, because the mean of its divisors is an integer number (753586041).

Almost surely, 2^1507172081 is an apocalyptic number.

It is an amenable number.

1507172081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1507172081 is an equidigital number, since it uses as much as digits as its factorization.

1507172081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 1507172081 is about 38822.3142148945. The cubic root of 1507172081 is about 1146.5357831934.

The spelling of 1507172081 in words is "one billion, five hundred seven million, one hundred seventy-two thousand, eighty-one".