420430251 has 8 divisors (see below), whose sum is σ = 560669184. Its totient is φ = 280239080.

The previous prime is 420430249. The next prime is 420430253. The reversal of 420430251 is 152034024.

It is an interprime number because it is at equal distance from previous prime (420430249) and next prime (420430253).

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 420430251 - 2¹ = 420430249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420430253) 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, 24430 + ... + 37916.

It is an arithmetic number, because the mean of its divisors is an integer number (70083648).

Almost surely, 2^420430251 is an apocalyptic number.

420430251 is a deficient number, since it is larger than the sum of its proper divisors (140238933).

420430251 is a wasteful number, since it uses less digits than its factorization.

420430251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23881.

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

The square root of 420430251 is about 20504.3958945393. The cubic root of 420430251 is about 749.1428732626.

Adding to 420430251 its reverse (152034024), we get a palindrome (572464275).

The spelling of 420430251 in words is "four hundred twenty million, four hundred thirty thousand, two hundred fifty-one".