615042 has 24 divisors (see below), whose sum is σ = 1362816. Its totient is φ = 200376.

The previous prime is 615031. The next prime is 615047. The reversal of 615042 is 240516.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (615047) by changing a digit.

615042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 483 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (56784).

2⁶¹⁵⁰⁴² is an apocalyptic number.

615042 is an abundant number, since it is smaller than the sum of its proper divisors (747774).

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

615042 is a wasteful number, since it uses less digits than its factorization.

615042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 615042 is about 784.2461348327. The cubic root of 615042 is about 85.0422857653.

Adding to 615042 its reverse (240516), we get a palindrome (855558).

The spelling of 615042 in words is "six hundred fifteen thousand, forty-two".