84021315 has 64 divisors (see below), whose sum is σ = 161021952. Its totient is φ = 36604800.

The previous prime is 84021313. The next prime is 84021317. The reversal of 84021315 is 51312048.

It is an interprime number because it is at equal distance from previous prime (84021313) and next prime (84021317).

It is not a de Polignac number, because 84021315 - 2¹ = 84021313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84021313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 270010 + ... + 270320.

It is an arithmetic number, because the mean of its divisors is an integer number (2515968).

Almost surely, 2^84021315 is an apocalyptic number.

84021315 is a deficient number, since it is larger than the sum of its proper divisors (77000637).

84021315 is a wasteful number, since it uses less digits than its factorization.

84021315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 84021315 is about 9166.3141447367. The cubic root of 84021315 is about 437.9889542887.

It can be divided in two parts, 840 and 21315, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 84021315 in words is "eighty-four million, twenty-one thousand, three hundred fifteen".