421312545 has 12 divisors (see below), whose sum is σ = 730275156. Its totient is φ = 224700000.

The previous prime is 421312523. The next prime is 421312553. The reversal of 421312545 is 545213124.

It can be written as a sum of positive squares in 2 ways, for example, as 221146641 + 200165904 = 14871^2 + 14148^2 .

It is not a de Polignac number, because 421312545 - 2⁶ = 421312481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4681206 + ... + 4681295.

It is an arithmetic number, because the mean of its divisors is an integer number (60856263).

Almost surely, 2^421312545 is an apocalyptic number.

421312545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421312545 is a deficient number, since it is larger than the sum of its proper divisors (308962611).

421312545 is a wasteful number, since it uses less digits than its factorization.

421312545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362512 (or 9362509 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 421312545 is about 20525.8993712821. The cubic root of 421312545 is about 749.6665450991. Note that the first 3 decimals are identical.

Adding to 421312545 its reverse (545213124), we get a palindrome (966525669).

The spelling of 421312545 in words is "four hundred twenty-one million, three hundred twelve thousand, five hundred forty-five".