420518601 has 8 divisors (see below), whose sum is σ = 622990560. Its totient is φ = 280345716.

The previous prime is 420518561. The next prime is 420518639. The reversal of 420518601 is 106815024.

420518601 is a `hidden beast` number, since 4 + 2 + 0 + 51 + 8 + 601 = 666.

It is not a de Polignac number, because 420518601 - 2¹⁰ = 420517577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15574763 = 420518601 / (4 + 2 + 0 + 5 + 1 + 8 + 6 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (420518671) 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, 7787355 + ... + 7787408.

It is an arithmetic number, because the mean of its divisors is an integer number (77873820).

Almost surely, 2^420518601 is an apocalyptic number.

It is an amenable number.

420518601 is a deficient number, since it is larger than the sum of its proper divisors (202471959).

420518601 is a wasteful number, since it uses less digits than its factorization.

420518601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15574772 (or 15574766 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 420518601 is about 20506.5501974369. The cubic root of 420518601 is about 749.1953450159.

The spelling of 420518601 in words is "four hundred twenty million, five hundred eighteen thousand, six hundred one".