615432 has 16 divisors (see below), whose sum is σ = 1538640. Its totient is φ = 205136.

The previous prime is 615431. The next prime is 615437. The reversal of 615432 is 234516.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 615399 and 615408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615432.

It is not an unprimeable number, because it can be changed into a prime (615431) 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, 12798 + ... + 12845.

It is an arithmetic number, because the mean of its divisors is an integer number (96165).

2⁶¹⁵⁴³² is an apocalyptic number.

It is an amenable number.

615432 is an abundant number, since it is smaller than the sum of its proper divisors (923208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

615432 is a wasteful number, since it uses less digits than its factorization.

615432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25652 (or 25648 counting only the distinct ones).

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

The square root of 615432 is about 784.4947418562. The cubic root of 615432 is about 85.0602571578.

Adding to 615432 its reverse (234516), we get a palindrome (849948).

The spelling of 615432 in words is "six hundred fifteen thousand, four hundred thirty-two".