42001355 has 16 divisors (see below), whose sum is σ = 55535328. Its totient is φ = 30240000.

The previous prime is 42001319. The next prime is 42001357. The reversal of 42001355 is 55310024.

It is not a de Polignac number, because 42001355 - 2²² = 37807051 is a prime.

It is a super-2 number, since 2×42001355² = 3528227643672050, which contains 22 as substring.

It is a Duffinian number.

42001355 is a modest number, since divided by 1355 gives 420 as remainder.

It is not an unprimeable number, because it can be changed into a prime (42001357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1775 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (3470958).

Almost surely, 2^42001355 is an apocalyptic number.

42001355 is a deficient number, since it is larger than the sum of its proper divisors (13533973).

42001355 is a wasteful number, since it uses less digits than its factorization.

42001355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678.

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

The square root of 42001355 is about 6480.8452380843. The cubic root of 42001355 is about 347.6064025565.

Adding to 42001355 its reverse (55310024), we get a palindrome (97311379).

It can be divided in two parts, 4200 and 1355, that added together give a palindrome (5555).

The spelling of 42001355 in words is "forty-two million, one thousand, three hundred fifty-five".