84752421 has 16 divisors (see below), whose sum is σ = 124287744. Its totient is φ = 51044544.

The previous prime is 84752399. The next prime is 84752431. The reversal of 84752421 is 12425748.

It is not a de Polignac number, because 84752421 - 2¹³ = 84744229 is a prime.

It is a super-2 number, since 2×84752421² = 14365945730722482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84752431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21286 + ... + 24951.

It is an arithmetic number, because the mean of its divisors is an integer number (7767984).

Almost surely, 2^84752421 is an apocalyptic number.

It is an amenable number.

84752421 is a deficient number, since it is larger than the sum of its proper divisors (39535323).

84752421 is a wasteful number, since it uses less digits than its factorization.

84752421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46300.

The product of its digits is 17920, while the sum is 33.

The square root of 84752421 is about 9206.1078094926. The cubic root of 84752421 is about 439.2556647490.

The spelling of 84752421 in words is "eighty-four million, seven hundred fifty-two thousand, four hundred twenty-one".