421751045 has 8 divisors (see below), whose sum is σ = 535872024. Its totient is φ = 317553664.

The previous prime is 421751041. The next prime is 421751081. The reversal of 421751045 is 540157124.

It can be written as a sum of positive squares in 4 ways, for example, as 35117476 + 386633569 = 5926^2 + 19663^2 .

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 421751045 - 2² = 421751041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421750999 and 421751017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421751041) 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, 2480804 + ... + 2480973.

It is an arithmetic number, because the mean of its divisors is an integer number (66984003).

Almost surely, 2^421751045 is an apocalyptic number.

It is an amenable number.

421751045 is a deficient number, since it is larger than the sum of its proper divisors (114120979).

421751045 is a wasteful number, since it uses less digits than its factorization.

421751045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961799.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 421751045 is about 20536.5782203365. The cubic root of 421751045 is about 749.9265379899.

The spelling of 421751045 in words is "four hundred twenty-one million, seven hundred fifty-one thousand, forty-five".