420045005 has 8 divisors (see below), whose sum is σ = 507393024. Its totient is φ = 333810000.

The previous prime is 420044983. The next prime is 420045011. The reversal of 420045005 is 500540024.

It is a happy number.

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

It is not a de Polignac number, because 420045005 - 2⁸ = 420044749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277421 + ... + 278930.

It is an arithmetic number, because the mean of its divisors is an integer number (63424128).

Almost surely, 2^420045005 is an apocalyptic number.

It is an amenable number.

420045005 is a deficient number, since it is larger than the sum of its proper divisors (87348019).

420045005 is a wasteful number, since it uses less digits than its factorization.

420045005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556507.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 420045005 is about 20494.9995120761. Note that the first 3 decimals coincide. The cubic root of 420045005 is about 748.9139867111.

Adding to 420045005 its sum of digits (20), we get a square (420045025 = 20495²).

Adding to 420045005 its reverse (500540024), we get a palindrome (920585029).

The spelling of 420045005 in words is "four hundred twenty million, forty-five thousand, five".