420003705 has 64 divisors (see below), whose sum is σ = 749802240. Its totient is φ = 200724480.

The previous prime is 420003697. The next prime is 420003707. The reversal of 420003705 is 507300024.

It is a happy number.

It is not a de Polignac number, because 420003705 - 2³ = 420003697 is a prime.

It is a super-2 number, since 2×420003705² = 352806224427454050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420003707) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2176089 + ... + 2176281.

It is an arithmetic number, because the mean of its divisors is an integer number (11715660).

Almost surely, 2^420003705 is an apocalyptic number.

It is an amenable number.

420003705 is a deficient number, since it is larger than the sum of its proper divisors (329798535).

420003705 is a wasteful number, since it uses less digits than its factorization.

420003705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 420003705 is about 20493.9919244641. The cubic root of 420003705 is about 748.8894408005.

Adding to 420003705 its reverse (507300024), we get a palindrome (927303729).

The spelling of 420003705 in words is "four hundred twenty million, three thousand, seven hundred five".