420907 has 4 divisors (see below), whose sum is σ = 443080. Its totient is φ = 398736.

The previous prime is 420899. The next prime is 420919. The reversal of 420907 is 709024.

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

It is a cyclic number.

It is not a de Polignac number, because 420907 - 2³ = 420899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11058 + ... + 11095.

It is an arithmetic number, because the mean of its divisors is an integer number (110770).

2⁴²⁰⁹⁰⁷ is an apocalyptic number.

420907 is a deficient number, since it is larger than the sum of its proper divisors (22173).

420907 is a wasteful number, since it uses less digits than its factorization.

420907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22172.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 420907 is about 648.7734581501. The cubic root of 420907 is about 74.9425931076.

The spelling of 420907 in words is "four hundred twenty thousand, nine hundred seven".