420647342 has 4 divisors (see below), whose sum is σ = 630971016. Its totient is φ = 210323670.

The previous prime is 420647341. The next prime is 420647363. The reversal of 420647342 is 243746024.

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

It is a junction number, because it is equal to n+sod(n) for n = 420647299 and 420647308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420647341) 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 as a sum of consecutive naturals, namely, 105161834 + ... + 105161837.

It is an arithmetic number, because the mean of its divisors is an integer number (157742754).

Almost surely, 2^420647342 is an apocalyptic number.

420647342 is a deficient number, since it is larger than the sum of its proper divisors (210323674).

420647342 is a wasteful number, since it uses less digits than its factorization.

420647342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210323673.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 420647342 is about 20509.6889786267. The cubic root of 420647342 is about 749.2717921429.

The spelling of 420647342 in words is "four hundred twenty million, six hundred forty-seven thousand, three hundred forty-two".