86532421 has 2 divisors, whose sum is σ = 86532422. Its totient is φ = 86532420.

The previous prime is 86532419. The next prime is 86532437. The reversal of 86532421 is 12423568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 13771521 = 8530^2 + 3711^2 .

It is a cyclic number.

It is not a de Polignac number, because 86532421 - 2¹ = 86532419 is a prime.

Together with 86532419, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86532451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43266210 + 43266211.

It is an arithmetic number, because the mean of its divisors is an integer number (43266211).

Almost surely, 2^86532421 is an apocalyptic number.

It is an amenable number.

86532421 is a deficient number, since it is larger than the sum of its proper divisors (1).

86532421 is an equidigital number, since it uses as much as digits as its factorization.

86532421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 86532421 is about 9302.2804193380. The cubic root of 86532421 is about 442.3095178535.

Adding to 86532421 its reverse (12423568), we get a palindrome (98955989).

The spelling of 86532421 in words is "eighty-six million, five hundred thirty-two thousand, four hundred twenty-one".