8145442 has 4 divisors (see below), whose sum is σ = 12218166. Its totient is φ = 4072720.

The previous prime is 8145437. The next prime is 8145443. The reversal of 8145442 is 2445418.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5517801 + 2627641 = 2349^2 + 1621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8145442.

It is not an unprimeable number, because it can be changed into a prime (8145443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036359 + ... + 2036362.

Almost surely, 2^8145442 is an apocalyptic number.

8145442 is a deficient number, since it is larger than the sum of its proper divisors (4072724).

8145442 is a wasteful number, since it uses less digits than its factorization.

8145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072723.

The product of its digits is 5120, while the sum is 28.

The square root of 8145442 is about 2854.0220741963. The cubic root of 8145442 is about 201.2047450421.

The spelling of 8145442 in words is "eight million, one hundred forty-five thousand, four hundred forty-two".