87145145 has 16 divisors (see below), whose sum is σ = 114546960. Its totient is φ = 63350784.

The previous prime is 87145141. The next prime is 87145159. The reversal of 87145145 is 54154178.

It can be written as a sum of positive squares in 8 ways, for example, as 17572864 + 69572281 = 4192^2 + 8341^2 .

It is a cyclic number.

It is not a de Polignac number, because 87145145 - 2² = 87145141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87145141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15212 + ... + 20141.

It is an arithmetic number, because the mean of its divisors is an integer number (7159185).

Almost surely, 2^87145145 is an apocalyptic number.

87145145 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87145145 is a deficient number, since it is larger than the sum of its proper divisors (27401815).

87145145 is a wasteful number, since it uses less digits than its factorization.

87145145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35404.

The product of its digits is 22400, while the sum is 35.

The square root of 87145145 is about 9335.1563993326. The cubic root of 87145145 is about 443.3510407435.

The spelling of 87145145 in words is "eighty-seven million, one hundred forty-five thousand, one hundred forty-five".