420706645 has 8 divisors (see below), whose sum is σ = 531419040. Its totient is φ = 318851280.

The previous prime is 420706609. The next prime is 420706669. The reversal of 420706645 is 546607024.

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

It is not a de Polignac number, because 420706645 - 2²¹ = 418609493 is a prime.

It is a super-2 number, since 2×420706645² = 353988162294312050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420706645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214151 + ... + 2214340.

It is an arithmetic number, because the mean of its divisors is an integer number (66427380).

Almost surely, 2^420706645 is an apocalyptic number.

It is an amenable number.

420706645 is a deficient number, since it is larger than the sum of its proper divisors (110712395).

420706645 is a wasteful number, since it uses less digits than its factorization.

420706645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428515.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 420706645 is about 20511.1346590090. The cubic root of 420706645 is about 749.3070013492.

The spelling of 420706645 in words is "four hundred twenty million, seven hundred six thousand, six hundred forty-five".