420242647 has 8 divisors (see below), whose sum is σ = 459486720. Its totient is φ = 381171960.

The previous prime is 420242623. The next prime is 420242653. The reversal of 420242647 is 746242024.

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 420242647 - 2⁷ = 420242519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420242657) 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, 38247 + ... + 47992.

It is an arithmetic number, because the mean of its divisors is an integer number (57435840).

Almost surely, 2^420242647 is an apocalyptic number.

420242647 is a deficient number, since it is larger than the sum of its proper divisors (39244073).

420242647 is a wasteful number, since it uses less digits than its factorization.

420242647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86693.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 420242647 is about 20499.8206577521. The cubic root of 420242647 is about 749.0314294035.

The spelling of 420242647 in words is "four hundred twenty million, two hundred forty-two thousand, six hundred forty-seven".