420383251 has 4 divisors (see below), whose sum is σ = 420425104. Its totient is φ = 420341400.

The previous prime is 420383207. The next prime is 420383279. The reversal of 420383251 is 152383024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(420383251) divides (420383251-1)³.

It is a cyclic number.

It is not a de Polignac number, because 420383251 - 2¹⁹ = 419858963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420387251) 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, 4186 + ... + 29296.

It is an arithmetic number, because the mean of its divisors is an integer number (105106276).

Almost surely, 2^420383251 is an apocalyptic number.

420383251 is the 16741-st pentagonal number.

420383251 is a deficient number, since it is larger than the sum of its proper divisors (41853).

420383251 is a wasteful number, since it uses less digits than its factorization.

420383251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41852.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 420383251 is about 20503.2497668053. The cubic root of 420383251 is about 749.1149566010.

The spelling of 420383251 in words is "four hundred twenty million, three hundred eighty-three thousand, two hundred fifty-one".