1087245281 has 4 divisors (see below), whose sum is σ = 1087598100. Its totient is φ = 1086892464.

The previous prime is 1087245277. The next prime is 1087245311. The reversal of 1087245281 is 1825427801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 548309056 + 538936225 = 23416^2 + 23215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087245281 - 2² = 1087245277 is a prime.

It is a super-2 number, since 2×1087245281² = 2364204602113537922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087245781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171746 + ... + 177963.

It is an arithmetic number, because the mean of its divisors is an integer number (271899525).

Almost surely, 2^1087245281 is an apocalyptic number.

It is an amenable number.

1087245281 is a deficient number, since it is larger than the sum of its proper divisors (352819).

1087245281 is an equidigital number, since it uses as much as digits as its factorization.

1087245281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352818.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 1087245281 is about 32973.4026299986. The cubic root of 1087245281 is about 1028.2747632292.

The spelling of 1087245281 in words is "one billion, eighty-seven million, two hundred forty-five thousand, two hundred eighty-one".