98765421 has 8 divisors (see below), whose sum is σ = 131750304.
Its totient is φ = 65812080.
The previous prime is 98765419. The next prime is 98765431. The reversal of 98765421 is 12456789.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 98765421 - 21 = 98765419 is a prime.
It is a Curzon number.
It is a nialpdrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (98765431) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786 + ... + 14076.
It is an arithmetic number, because the mean of its divisors is an integer number (16468788).
Almost surely, 298765421 is an apocalyptic number.
It is an amenable number.
98765421 is a deficient number, since it is larger than the sum of its proper divisors (32984883).
98765421 is a wasteful number, since it uses less digits than its factorization.
98765421 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15771.
The product of its digits is 120960, while the sum is 42.
The square root of 98765421 is about 9938.0793416032.
The cubic root of 98765421 is about 462.2408322523.
The spelling of 98765421 in words is "ninety-eight million, seven hundred sixty-five thousand, four hundred twenty-one".