45609142 has 4 divisors (see below), whose sum is σ = 68413716. Its totient is φ = 22804570.

The previous prime is 45609133. The next prime is 45609143. The reversal of 45609142 is 24190654.

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 (45609143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11402284 + ... + 11402287.

It is an arithmetic number, because the mean of its divisors is an integer number (17103429).

Almost surely, 2^45609142 is an apocalyptic number.

45609142 is a deficient number, since it is larger than the sum of its proper divisors (22804574).

45609142 is a wasteful number, since it uses less digits than its factorization.

45609142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22804573.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45609142 is about 6753.4540792101. The cubic root of 45609142 is about 357.2870709474.

Adding to 45609142 its reverse (24190654), we get a palindrome (69799796).

The spelling of 45609142 in words is "forty-five million, six hundred nine thousand, one hundred forty-two".