420715 has 4 divisors (see below), whose sum is σ = 504864. Its totient is φ = 336568.

The previous prime is 420691. The next prime is 420731. The reversal of 420715 is 517024.

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 420715 - 2⁵ = 420683 is a prime.

It is a super-2 number, since 2×420715² = 354002222450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420692 and 420701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42067 + ... + 42076.

It is an arithmetic number, because the mean of its divisors is an integer number (126216).

2⁴²⁰⁷¹⁵ is an apocalyptic number.

420715 is a deficient number, since it is larger than the sum of its proper divisors (84149).

420715 is an equidigital number, since it uses as much as digits as its factorization.

420715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84148.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 420715 is about 648.6254697435. The cubic root of 420715 is about 74.9311961590.

Adding to 420715 its reverse (517024), we get a palindrome (937739).

The spelling of 420715 in words is "four hundred twenty thousand, seven hundred fifteen".