87365421 has 24 divisors (see below), whose sum is σ = 148258656. Its totient is φ = 48875040.

The previous prime is 87365417. The next prime is 87365423. The reversal of 87365421 is 12456378.

87365421 is a `hidden beast` number, since 87 + 36 + 542 + 1 = 666.

It is not a de Polignac number, because 87365421 - 2² = 87365417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87365423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32655 + ... + 35228.

It is an arithmetic number, because the mean of its divisors is an integer number (6177444).

Almost surely, 2^87365421 is an apocalyptic number.

It is an amenable number.

87365421 is a deficient number, since it is larger than the sum of its proper divisors (60893235).

87365421 is a wasteful number, since it uses less digits than its factorization.

87365421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67913 (or 67910 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 87365421 is about 9346.9471486684. The cubic root of 87365421 is about 443.7242779245.

The spelling of 87365421 in words is "eighty-seven million, three hundred sixty-five thousand, four hundred twenty-one".