102400321 has 8 divisors (see below), whose sum is σ = 104184704. Its totient is φ = 100623600.

The previous prime is 102400313. The next prime is 102400369. The reversal of 102400321 is 123004201.

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

It is a cyclic number.

It is not a de Polignac number, because 102400321 - 2³ = 102400313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102400021) 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, 29371 + ... + 32671.

It is an arithmetic number, because the mean of its divisors is an integer number (13023088).

Almost surely, 2^102400321 is an apocalyptic number.

It is an amenable number.

102400321 is a deficient number, since it is larger than the sum of its proper divisors (1784383).

102400321 is an equidigital number, since it uses as much as digits as its factorization.

102400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102400321 is about 10119.3043733253. The cubic root of 102400321 is about 467.8433269728.

Adding to 102400321 its reverse (123004201), we get a palindrome (225404522).

The spelling of 102400321 in words is "one hundred two million, four hundred thousand, three hundred twenty-one".