42404553 has 20 divisors (see below), whose sum is σ = 65061700. Its totient is φ = 27503712.

The previous prime is 42404543. The next prime is 42404603. The reversal of 42404553 is 35540424.

It can be written as a sum of positive squares in 2 ways, for example, as 38900169 + 3504384 = 6237^2 + 1872^2 .

It is not a de Polignac number, because 42404553 - 2⁶ = 42404489 is a prime.

It is a super-2 number, since 2×42404553² = 3596292230259618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (42404503) by changing a digit.

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 in 19 ways as a sum of consecutive naturals, for example, 4078 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (3253085).

Almost surely, 2^42404553 is an apocalyptic number.

It is an amenable number.

42404553 is a deficient number, since it is larger than the sum of its proper divisors (22657147).

42404553 is a wasteful number, since it uses less digits than its factorization.

42404553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198 (or 14189 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42404553 is about 6511.8778397633. The cubic root of 42404553 is about 348.7151612788.

Adding to 42404553 its reverse (35540424), we get a palindrome (77944977).

The spelling of 42404553 in words is "forty-two million, four hundred four thousand, five hundred fifty-three".