87811265 has 16 divisors (see below), whose sum is σ = 107585280. Its totient is φ = 68789760.

The previous prime is 87811259. The next prime is 87811271. The reversal of 87811265 is 56211878.

It is an interprime number because it is at equal distance from previous prime (87811259) and next prime (87811271).

It is not a de Polignac number, because 87811265 - 2¹⁴ = 87794881 is a prime.

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, 50897 + ... + 52593.

It is an arithmetic number, because the mean of its divisors is an integer number (6724080).

Almost surely, 2^87811265 is an apocalyptic number.

It is an amenable number.

87811265 is a deficient number, since it is larger than the sum of its proper divisors (19774015).

87811265 is a wasteful number, since it uses less digits than its factorization.

87811265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its digits is 26880, while the sum is 38.

The square root of 87811265 is about 9370.7665108037. The cubic root of 87811265 is about 444.4778034799.

The spelling of 87811265 in words is "eighty-seven million, eight hundred eleven thousand, two hundred sixty-five".