420170705 has 16 divisors (see below), whose sum is σ = 535695120. Its totient is φ = 315770112.

The previous prime is 420170701. The next prime is 420170711. The reversal of 420170705 is 507071024.

It can be written as a sum of positive squares in 8 ways, for example, as 12453841 + 407716864 = 3529^2 + 20192^2 .

It is a cyclic number.

It is not a de Polignac number, because 420170705 - 2² = 420170701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420170701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33794 + ... + 44523.

It is an arithmetic number, because the mean of its divisors is an integer number (33480945).

Almost surely, 2^420170705 is an apocalyptic number.

It is an amenable number.

420170705 is a deficient number, since it is larger than the sum of its proper divisors (115524415).

420170705 is a wasteful number, since it uses less digits than its factorization.

420170705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78388.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 420170705 is about 20498.0658843707. The cubic root of 420170705 is about 748.9886843412.

The spelling of 420170705 in words is "four hundred twenty million, one hundred seventy thousand, seven hundred five".