421540345 has 8 divisors (see below), whose sum is σ = 507773376. Its totient is φ = 335948976.

The previous prime is 421540337. The next prime is 421540351. The reversal of 421540345 is 543045124.

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 421540345 - 2³ = 421540337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158967 + ... + 161596.

It is an arithmetic number, because the mean of its divisors is an integer number (63471672).

Almost surely, 2^421540345 is an apocalyptic number.

It is an amenable number.

421540345 is a deficient number, since it is larger than the sum of its proper divisors (86233031).

421540345 is a wasteful number, since it uses less digits than its factorization.

421540345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320831.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 421540345 is about 20531.4477083327. The cubic root of 421540345 is about 749.8016334648.

Adding to 421540345 its reverse (543045124), we get a palindrome (964585469).

The spelling of 421540345 in words is "four hundred twenty-one million, five hundred forty thousand, three hundred forty-five".