42427131 has 4 divisors (see below), whose sum is σ = 56569512. Its totient is φ = 28284752.

The previous prime is 42427103. The next prime is 42427139. The reversal of 42427131 is 13172424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42427131 - 2⁶ = 42427067 is a prime.

It is a super-2 number, since 2×42427131² = 3600122889782322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42427139) 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, 7071186 + ... + 7071191.

It is an arithmetic number, because the mean of its divisors is an integer number (14142378).

Almost surely, 2^42427131 is an apocalyptic number.

42427131 is a deficient number, since it is larger than the sum of its proper divisors (14142381).

42427131 is a wasteful number, since it uses less digits than its factorization.

42427131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14142380.

The product of its digits is 1344, while the sum is 24.

The square root of 42427131 is about 6513.6112103809. The cubic root of 42427131 is about 348.7770405929. Note that the first 3 decimals are identical.

Adding to 42427131 its reverse (13172424), we get a palindrome (55599555).

The spelling of 42427131 in words is "forty-two million, four hundred twenty-seven thousand, one hundred thirty-one".