85421534 has 16 divisors (see below), whose sum is σ = 141698160. Its totient is φ = 38295360.

The previous prime is 85421527. The next prime is 85421561. The reversal of 85421534 is 43512458.

It is a self number, because there is not a number n which added to its sum of digits gives 85421534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24989 + ... + 28200.

It is an arithmetic number, because the mean of its divisors is an integer number (8856135).

Almost surely, 2^85421534 is an apocalyptic number.

85421534 is a deficient number, since it is larger than the sum of its proper divisors (56276626).

85421534 is a wasteful number, since it uses less digits than its factorization.

85421534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53275.

The product of its digits is 19200, while the sum is 32.

The square root of 85421534 is about 9242.3770751901. The cubic root of 85421534 is about 440.4085977187.

The spelling of 85421534 in words is "eighty-five million, four hundred twenty-one thousand, five hundred thirty-four".