421707 has 16 divisors (see below), whose sum is σ = 661248. Its totient is φ = 235680.

The previous prime is 421703. The next prime is 421709. The reversal of 421707 is 707124.

It is not a de Polignac number, because 421707 - 2² = 421703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421703) 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, 63 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2⁴²¹⁷⁰⁷ is an apocalyptic number.

421707 is a deficient number, since it is larger than the sum of its proper divisors (239541).

421707 is a wasteful number, since it uses less digits than its factorization.

421707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 421707 is about 649.3897135003. The cubic root of 421707 is about 74.9900431226.

It can be divided in two parts, 421 and 707, that added together give a triangular number (1128 = T₄₇).

The spelling of 421707 in words is "four hundred twenty-one thousand, seven hundred seven", and thus it is an iban number.