42001131 has 4 divisors (see below), whose sum is σ = 56001512. Its totient is φ = 28000752.

The previous prime is 42001117. The next prime is 42001171. The reversal of 42001131 is 13110024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42001131 - 2¹⁰ = 42000107 is a prime.

It is a super-2 number, since 2×42001131² = 3528190010558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42001171) 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, 7000186 + ... + 7000191.

It is an arithmetic number, because the mean of its divisors is an integer number (14000378).

Almost surely, 2^42001131 is an apocalyptic number.

42001131 is a deficient number, since it is larger than the sum of its proper divisors (14000381).

42001131 is a wasteful number, since it uses less digits than its factorization.

42001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14000380.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 42001131 is about 6480.8279563648. The cubic root of 42001131 is about 347.6057846084.

Adding to 42001131 its reverse (13110024), we get a palindrome (55111155).

The spelling of 42001131 in words is "forty-two million, one thousand, one hundred thirty-one".