45243742 has 4 divisors (see below), whose sum is σ = 67865616. Its totient is φ = 22621870.

The previous prime is 45243727. The next prime is 45243743. The reversal of 45243742 is 24734254.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45243743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310934 + ... + 11310937.

It is an arithmetic number, because the mean of its divisors is an integer number (16966404).

Almost surely, 2^45243742 is an apocalyptic number.

45243742 is a deficient number, since it is larger than the sum of its proper divisors (22621874).

45243742 is a wasteful number, since it uses less digits than its factorization.

45243742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22621873.

The product of its digits is 26880, while the sum is 31.

The square root of 45243742 is about 6726.3468539765. The cubic root of 45243742 is about 356.3303702122.

Adding to 45243742 its reverse (24734254), we get a palindrome (69977996).

The spelling of 45243742 in words is "forty-five million, two hundred forty-three thousand, seven hundred forty-two".