87156261 has 12 divisors (see below), whose sum is σ = 126240192. Its totient is φ = 57943656.

The previous prime is 87156259. The next prime is 87156271. The reversal of 87156261 is 16265178.

It is not a de Polignac number, because 87156261 - 2¹ = 87156259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87156241) 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 11 ways as a sum of consecutive naturals, for example, 9891 + ... + 16496.

It is an arithmetic number, because the mean of its divisors is an integer number (10520016).

Almost surely, 2^87156261 is an apocalyptic number.

It is an amenable number.

87156261 is a deficient number, since it is larger than the sum of its proper divisors (39083931).

87156261 is a wasteful number, since it uses less digits than its factorization.

87156261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26760 (or 26757 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 87156261 is about 9335.7517640520. The cubic root of 87156261 is about 443.3698908303.

The spelling of 87156261 in words is "eighty-seven million, one hundred fifty-six thousand, two hundred sixty-one".