420409671 has 8 divisors (see below), whose sum is σ = 611505024. Its totient is φ = 254793720.

The previous prime is 420409669. The next prime is 420409687. The reversal of 420409671 is 176904024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420409671 - 2¹ = 420409669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 12739687 = 420409671 / (4 + 2 + 0 + 4 + 0 + 9 + 6 + 7 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420459671) 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, 6369811 + ... + 6369876.

It is an arithmetic number, because the mean of its divisors is an integer number (76438128).

Almost surely, 2^420409671 is an apocalyptic number.

420409671 is a deficient number, since it is larger than the sum of its proper divisors (191095353).

420409671 is a wasteful number, since it uses less digits than its factorization.

420409671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739701.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 420409671 is about 20503.8940447906. The cubic root of 420409671 is about 749.1306495847.

The spelling of 420409671 in words is "four hundred twenty million, four hundred nine thousand, six hundred seventy-one".