615406 has 12 divisors (see below), whose sum is σ = 1015056. Its totient is φ = 279620.

The previous prime is 615403. The next prime is 615413. The reversal of 615406 is 604516.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1030 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (84588).

2⁶¹⁵⁴⁰⁶ is an apocalyptic number.

615406 is a deficient number, since it is larger than the sum of its proper divisors (399650).

615406 is a wasteful number, since it uses less digits than its factorization.

615406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 615406 is about 784.4781705057. The cubic root of 615406 is about 85.0590593012.

The spelling of 615406 in words is "six hundred fifteen thousand, four hundred six".