423615 has 16 divisors (see below), whose sum is σ = 700416. Its totient is φ = 218400.

The previous prime is 423601. The next prime is 423617. The reversal of 423615 is 516324.

It is a happy number.

It is not a de Polignac number, because 423615 - 2⁹ = 423103 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 2³ + 6⁷ + 3² + 1 + 5⁷ .

423615 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 423591 and 423600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423617) 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, 10 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (43776).

2⁴²³⁶¹⁵ is an apocalyptic number.

423615 is a deficient number, since it is larger than the sum of its proper divisors (276801).

423615 is a wasteful number, since it uses less digits than its factorization.

423615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its digits is 720, while the sum is 21.

The square root of 423615 is about 650.8571271792. The cubic root of 423615 is about 75.1029696764.

Adding to 423615 its reverse (516324), we get a palindrome (939939).

The spelling of 423615 in words is "four hundred twenty-three thousand, six hundred fifteen".