420703251 has 16 divisors (see below), whose sum is σ = 581435904. Its totient is φ = 270398304.

The previous prime is 420703249. The next prime is 420703277. The reversal of 420703251 is 152307024.

It is not a de Polignac number, because 420703251 - 2¹ = 420703249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420703651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12820 + ... + 31713.

It is an arithmetic number, because the mean of its divisors is an integer number (36339744).

Almost surely, 2^420703251 is an apocalyptic number.

420703251 is a deficient number, since it is larger than the sum of its proper divisors (160732653).

420703251 is a wasteful number, since it uses less digits than its factorization.

420703251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44650.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 420703251 is about 20511.0519232925. The cubic root of 420703251 is about 749.3049863626.

The spelling of 420703251 in words is "four hundred twenty million, seven hundred three thousand, two hundred fifty-one".