6615442 has 4 divisors (see below), whose sum is σ = 9923166. Its totient is φ = 3307720.

The previous prime is 6615377. The next prime is 6615443. The reversal of 6615442 is 2445166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2445166 = 2 ⋅1222583.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 168921 = 2539^2 + 411^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6615442.

It is not an unprimeable number, because it can be changed into a prime (6615443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1653859 + ... + 1653862.

Almost surely, 2^6615442 is an apocalyptic number.

6615442 is a deficient number, since it is larger than the sum of its proper divisors (3307724).

6615442 is a wasteful number, since it uses less digits than its factorization.

6615442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307723.

The product of its digits is 5760, while the sum is 28.

The square root of 6615442 is about 2572.0501550320. The cubic root of 6615442 is about 187.7239232863.

The spelling of 6615442 in words is "six million, six hundred fifteen thousand, four hundred forty-two".