84427251 has 8 divisors (see below), whose sum is σ = 114693840. Its totient is φ = 55222752.

The previous prime is 84427199. The next prime is 84427261. The reversal of 84427251 is 15272448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84427251 - 2¹⁴ = 84410867 is a prime.

It is a super-2 number, since 2×84427251² = 14255921422834002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84427261) 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 7 ways as a sum of consecutive naturals, for example, 265336 + ... + 265653.

It is an arithmetic number, because the mean of its divisors is an integer number (14336730).

Almost surely, 2^84427251 is an apocalyptic number.

84427251 is a deficient number, since it is larger than the sum of its proper divisors (30266589).

84427251 is a wasteful number, since it uses less digits than its factorization.

84427251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531045.

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

The square root of 84427251 is about 9188.4302794329. The cubic root of 84427251 is about 438.6931800349.

Adding to 84427251 its reverse (15272448), we get a palindrome (99699699).

The spelling of 84427251 in words is "eighty-four million, four hundred twenty-seven thousand, two hundred fifty-one".