420245279 has 4 divisors (see below), whose sum is σ = 420673776. Its totient is φ = 419816784.

The previous prime is 420245251. The next prime is 420245291. The reversal of 420245279 is 972542024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420245279 - 2¹⁶ = 420179743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420245179) 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, 212774 + ... + 214739.

It is an arithmetic number, because the mean of its divisors is an integer number (105168444).

Almost surely, 2^420245279 is an apocalyptic number.

420245279 is a deficient number, since it is larger than the sum of its proper divisors (428497).

420245279 is an equidigital number, since it uses as much as digits as its factorization.

420245279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428496.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 420245279 is about 20499.8848533352. The cubic root of 420245279 is about 749.0329931402.

The spelling of 420245279 in words is "four hundred twenty million, two hundred forty-five thousand, two hundred seventy-nine".