87641545 has 16 divisors (see below), whose sum is σ = 111799440. Its totient is φ = 65726464.

The previous prime is 87641513. The next prime is 87641551. The reversal of 87641545 is 54514678.

It can be written as a sum of positive squares in 8 ways, for example, as 9566649 + 78074896 = 3093^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 87641545 - 2⁵ = 87641513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87641498 and 87641507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20949 + ... + 24781.

It is an arithmetic number, because the mean of its divisors is an integer number (6987465).

Almost surely, 2^87641545 is an apocalyptic number.

87641545 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87641545 is a deficient number, since it is larger than the sum of its proper divisors (24157895).

87641545 is a wasteful number, since it uses less digits than its factorization.

87641545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124.

The product of its digits is 134400, while the sum is 40.

The square root of 87641545 is about 9361.7063081470. The cubic root of 87641545 is about 444.1912592800.

The spelling of 87641545 in words is "eighty-seven million, six hundred forty-one thousand, five hundred forty-five".