15001081 has 2 divisors, whose sum is σ = 15001082. Its totient is φ = 15001080.

The previous prime is 15001057. The next prime is 15001087. The reversal of 15001081 is 18010051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 2005056 = 3605^2 + 1416^2 .

It is an emirp because it is prime and its reverse (18010051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15001081 - 2¹³ = 14992889 is a prime.

It is a super-2 number, since 2×15001081² = 450064862337122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15001087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7500540 + 7500541.

It is an arithmetic number, because the mean of its divisors is an integer number (7500541).

Almost surely, 2^15001081 is an apocalyptic number.

It is an amenable number.

15001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15001081 is an equidigital number, since it uses as much as digits as its factorization.

15001081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 15001081 is about 3873.1229001931. The cubic root of 15001081 is about 246.6271316802.

The spelling of 15001081 in words is "fifteen million, one thousand, eighty-one".