45239842 has 4 divisors (see below), whose sum is σ = 67859766. Its totient is φ = 22619920.

The previous prime is 45239837. The next prime is 45239867. The reversal of 45239842 is 24893254.

It is a happy number.

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., 34210801 + 11029041 = 5849^2 + 3321^2 .

It is an unprimeable number.

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, 11309959 + ... + 11309962.

Almost surely, 2^45239842 is an apocalyptic number.

45239842 is a deficient number, since it is larger than the sum of its proper divisors (22619924).

45239842 is a wasteful number, since it uses less digits than its factorization.

45239842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22619923.

The product of its digits is 69120, while the sum is 37.

The square root of 45239842 is about 6726.0569429644. The cubic root of 45239842 is about 356.3201313864.

It can be divided in two parts, 4523 and 9842, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 45239842 in words is "forty-five million, two hundred thirty-nine thousand, eight hundred forty-two".