42001553 has 8 divisors (see below), whose sum is σ = 45878016. Its totient is φ = 38134800.

The previous prime is 42001529. The next prime is 42001573. The reversal of 42001553 is 35510024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42001553 - 2¹⁰ = 42000529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42001573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8975 + ... + 12827.

It is an arithmetic number, because the mean of its divisors is an integer number (5734752).

Almost surely, 2^42001553 is an apocalyptic number.

It is an amenable number.

42001553 is a deficient number, since it is larger than the sum of its proper divisors (3876463).

42001553 is a wasteful number, since it uses less digits than its factorization.

42001553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 42001553 is about 6480.8605138515. The cubic root of 42001553 is about 347.6069487766.

Adding to 42001553 its reverse (35510024), we get a palindrome (77511577).

The spelling of 42001553 in words is "forty-two million, one thousand, five hundred fifty-three".