420670 has 32 divisors (see below), whose sum is σ = 829440. Its totient is φ = 153120.

The previous prime is 420613. The next prime is 420671. The reversal of 420670 is 76024.

420670 = T₁₄₉ + T₁₅₀ + ... + T₁₇₉.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420671) 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, 7101 + ... + 7159.

It is an arithmetic number, because the mean of its divisors is an integer number (25920).

2⁴²⁰⁶⁷⁰ is an apocalyptic number.

420670 is a deficient number, since it is larger than the sum of its proper divisors (408770).

420670 is a wasteful number, since it uses less digits than its factorization.

420670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 420670 is about 648.5907800763. The cubic root of 420670 is about 74.9285244976.

Adding to 420670 its reverse (76024), we get a palindrome (496694).

The spelling of 420670 in words is "four hundred twenty thousand, six hundred seventy".