87560261 has 4 divisors (see below), whose sum is σ = 87811500. Its totient is φ = 87309024.

The previous prime is 87560257. The next prime is 87560273. The reversal of 87560261 is 16206578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16206578 = 2 ⋅8103289.

It can be written as a sum of positive squares in 2 ways, for example, as 31024900 + 56535361 = 5570^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 87560261 - 2² = 87560257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87560861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125096 + ... + 125793.

It is an arithmetic number, because the mean of its divisors is an integer number (21952875).

Almost surely, 2^87560261 is an apocalyptic number.

It is an amenable number.

87560261 is a deficient number, since it is larger than the sum of its proper divisors (251239).

87560261 is a wasteful number, since it uses less digits than its factorization.

87560261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251238.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 87560261 is about 9357.3639984773. The cubic root of 87560261 is about 444.0538936420.

The spelling of 87560261 in words is "eighty-seven million, five hundred sixty thousand, two hundred sixty-one".