420404051 has 16 divisors (see below), whose sum is σ = 476682240. Its totient is φ = 368660160.

The previous prime is 420404011. The next prime is 420404053. The reversal of 420404051 is 150404024.

It is a cyclic number.

It is not a de Polignac number, because 420404051 - 2¹⁸ = 420141907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420404053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970 + ... + 29063.

It is an arithmetic number, because the mean of its divisors is an integer number (29792640).

Almost surely, 2^420404051 is an apocalyptic number.

420404051 is a deficient number, since it is larger than the sum of its proper divisors (56278189).

420404051 is a wasteful number, since it uses less digits than its factorization.

420404051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31106.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 420404051 is about 20503.7569971944. The cubic root of 420404051 is about 749.1273114653.

Adding to 420404051 its reverse (150404024), we get a palindrome (570808075).

The spelling of 420404051 in words is "four hundred twenty million, four hundred four thousand, fifty-one".