420040351 has 4 divisors (see below), whose sum is σ = 420437304. Its totient is φ = 419643400.

The previous prime is 420040333. The next prime is 420040399. The reversal of 420040351 is 153040024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420040351 - 2¹⁵ = 420007583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420044351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196885 + ... + 199006.

It is an arithmetic number, because the mean of its divisors is an integer number (105109326).

Almost surely, 2^420040351 is an apocalyptic number.

420040351 is a deficient number, since it is larger than the sum of its proper divisors (396953).

420040351 is a wasteful number, since it uses less digits than its factorization.

420040351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396952.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 420040351 is about 20494.8859718711. The cubic root of 420040351 is about 748.9112207705.

Adding to 420040351 its reverse (153040024), we get a palindrome (573080375).

It can be divided in two parts, 4200 and 40351, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 420040351 in words is "four hundred twenty million, forty thousand, three hundred fifty-one".