87465921 has 8 divisors (see below), whose sum is σ = 116888640. Its totient is φ = 58176912.

The previous prime is 87465883. The next prime is 87465923. The reversal of 87465921 is 12956478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87465921 - 2⁹ = 87465409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87465923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31890 + ... + 34523.

It is an arithmetic number, because the mean of its divisors is an integer number (14611080).

Almost surely, 2^87465921 is an apocalyptic number.

It is an amenable number.

87465921 is a deficient number, since it is larger than the sum of its proper divisors (29422719).

87465921 is a wasteful number, since it uses less digits than its factorization.

87465921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66855.

The product of its digits is 120960, while the sum is 42.

The square root of 87465921 is about 9352.3216903612. The cubic root of 87465921 is about 443.8943574243.

It can be divided in two parts, 874 and 65921, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 87465921 in words is "eighty-seven million, four hundred sixty-five thousand, nine hundred twenty-one".