84431025 has 96 divisors (see below), whose sum is σ = 179988480. Its totient is φ = 38007360.

The previous prime is 84431021. The next prime is 84431029. The reversal of 84431025 is 52013448.

It is an interprime number because it is at equal distance from previous prime (84431021) and next prime (84431029).

It is not a de Polignac number, because 84431025 - 2² = 84431021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84431025.

It is not an unprimeable number, because it can be changed into a prime (84431021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 505492 + ... + 505658.

It is an arithmetic number, because the mean of its divisors is an integer number (1874880).

Almost surely, 2^84431025 is an apocalyptic number.

It is an amenable number.

84431025 is an abundant number, since it is smaller than the sum of its proper divisors (95557455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84431025 is a wasteful number, since it uses less digits than its factorization.

84431025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84431025 is about 9188.6356440986. The cubic root of 84431025 is about 438.6997166423.

The spelling of 84431025 in words is "eighty-four million, four hundred thirty-one thousand, twenty-five".