1325000081 has 8 divisors (see below), whose sum is σ = 1364153640. Its totient is φ = 1286022528.

The previous prime is 1325000071. The next prime is 1325000099. The reversal of 1325000081 is 1800005231.

It can be written as a sum of positive squares in 4 ways, for example, as 368025856 + 956974225 = 19184^2 + 30935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325000081 is a prime.

It is a super-2 number, since 2×1325000081² = 3511250429300013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325000071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28646 + ... + 58911.

It is an arithmetic number, because the mean of its divisors is an integer number (170519205).

Almost surely, 2^1325000081 is an apocalyptic number.

It is an amenable number.

1325000081 is a deficient number, since it is larger than the sum of its proper divisors (39153559).

1325000081 is an equidigital number, since it uses as much as digits as its factorization.

1325000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88003.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1325000081 is about 36400.5505590231. The cubic root of 1325000081 is about 1098.3446398952.

The spelling of 1325000081 in words is "one billion, three hundred twenty-five million, eighty-one", and thus it is an aban number.