420551243 has 8 divisors (see below), whose sum is σ = 497203680. Its totient is φ = 348042240.

The previous prime is 420551203. The next prime is 420551269. The reversal of 420551243 is 342155024.

It is a happy number.

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

It is not a de Polignac number, because 420551243 - 2⁶ = 420551179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420551203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035638 + ... + 1036043.

It is an arithmetic number, because the mean of its divisors is an integer number (62150460).

Almost surely, 2^420551243 is an apocalyptic number.

420551243 is a deficient number, since it is larger than the sum of its proper divisors (76652437).

420551243 is a wasteful number, since it uses less digits than its factorization.

420551243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071717.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 420551243 is about 20507.3460740292. The cubic root of 420551243 is about 749.2147294947.

The spelling of 420551243 in words is "four hundred twenty million, five hundred fifty-one thousand, two hundred forty-three".