615442 has 8 divisors (see below), whose sum is σ = 930816. Its totient is φ = 305172.

The previous prime is 615437. The next prime is 615449. The reversal of 615442 is 244516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (615449) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 958 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (116352).

2⁶¹⁵⁴⁴² is an apocalyptic number.

615442 is a deficient number, since it is larger than the sum of its proper divisors (315374).

615442 is a wasteful number, since it uses less digits than its factorization.

615442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552.

The product of its digits is 960, while the sum is 22.

The square root of 615442 is about 784.5011153593. The cubic root of 615442 is about 85.0607178629.

Adding to 615442 its reverse (244516), we get a palindrome (859958).

The spelling of 615442 in words is "six hundred fifteen thousand, four hundred forty-two".