42345553 has 4 divisors (see below), whose sum is σ = 44186688. Its totient is φ = 40504420.

The previous prime is 42345491. The next prime is 42345587. The reversal of 42345553 is 35554324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42345553 - 2¹⁷ = 42214481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42340553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920533 + ... + 920578.

It is an arithmetic number, because the mean of its divisors is an integer number (11046672).

Almost surely, 2^42345553 is an apocalyptic number.

It is an amenable number.

42345553 is a deficient number, since it is larger than the sum of its proper divisors (1841135).

42345553 is a wasteful number, since it uses less digits than its factorization.

42345553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841134.

The product of its digits is 36000, while the sum is 31.

The square root of 42345553 is about 6507.3460796242. The cubic root of 42345553 is about 348.5533567674.

Adding to 42345553 its reverse (35554324), we get a palindrome (77899877).

The spelling of 42345553 in words is "forty-two million, three hundred forty-five thousand, five hundred fifty-three".