420203451 has 8 divisors (see below), whose sum is σ = 570842640. Its totient is φ = 274849952.

The previous prime is 420203447. The next prime is 420203461. The reversal of 420203451 is 154302024.

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

It is a cyclic number.

It is not a de Polignac number, because 420203451 - 2² = 420203447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420203401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321236 + ... + 1321553.

It is an arithmetic number, because the mean of its divisors is an integer number (71355330).

Almost surely, 2^420203451 is an apocalyptic number.

420203451 is a deficient number, since it is larger than the sum of its proper divisors (150639189).

420203451 is a wasteful number, since it uses less digits than its factorization.

420203451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642845.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 420203451 is about 20498.8646270958. The cubic root of 420203451 is about 749.0081413111.

Adding to 420203451 its reverse (154302024), we get a palindrome (574505475).

The spelling of 420203451 in words is "four hundred twenty million, two hundred three thousand, four hundred fifty-one".