420007405 has 8 divisors (see below), whose sum is σ = 504271584. Its totient is φ = 335830800.

The previous prime is 420007397. The next prime is 420007433. The reversal of 420007405 is 504700024.

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

It is not a de Polignac number, because 420007405 - 2³ = 420007397 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, 10831 + ... + 30940.

It is an arithmetic number, because the mean of its divisors is an integer number (63033948).

Almost surely, 2^420007405 is an apocalyptic number.

It is an amenable number.

420007405 is a deficient number, since it is larger than the sum of its proper divisors (84264179).

420007405 is a wasteful number, since it uses less digits than its factorization.

420007405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43787.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 420007405 is about 20494.0821946239. The cubic root of 420007405 is about 748.8916398944.

Adding to 420007405 its reverse (504700024), we get a palindrome (924707429).

The spelling of 420007405 in words is "four hundred twenty million, seven thousand, four hundred five".