420352251 has 32 divisors (see below), whose sum is σ = 654739200. Its totient is φ = 237050880.

The previous prime is 420352249. The next prime is 420352267. The reversal of 420352251 is 152253024.

It is not a de Polignac number, because 420352251 - 2¹ = 420352249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420352211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45720 + ... + 54138.

It is an arithmetic number, because the mean of its divisors is an integer number (20460600).

Almost surely, 2^420352251 is an apocalyptic number.

420352251 is a deficient number, since it is larger than the sum of its proper divisors (234386949).

420352251 is a wasteful number, since it uses less digits than its factorization.

420352251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 420352251 is about 20502.4937751484. The cubic root of 420352251 is about 749.0965423449.

The spelling of 420352251 in words is "four hundred twenty million, three hundred fifty-two thousand, two hundred fifty-one".