420354434 has 4 divisors (see below), whose sum is σ = 630531654. Its totient is φ = 210177216.

The previous prime is 420354421. The next prime is 420354437. The reversal of 420354434 is 434453024.

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

It can be written as a sum of positive squares in only one way, i.e., 235530409 + 184824025 = 15347^2 + 13595^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420354397 and 420354406.

It is not an unprimeable number, because it can be changed into a prime (420354437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105088607 + ... + 105088610.

Almost surely, 2^420354434 is an apocalyptic number.

420354434 is a deficient number, since it is larger than the sum of its proper divisors (210177220).

420354434 is a wasteful number, since it uses less digits than its factorization.

420354434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210177219.

The product of its (nonzero) digits is 23040, while the sum is 29.

The square root of 420354434 is about 20502.5470125055. The cubic root of 420354434 is about 749.0978390946.

The spelling of 420354434 in words is "four hundred twenty million, three hundred fifty-four thousand, four hundred thirty-four".