42124231 has 2 divisors, whose sum is σ = 42124232. Its totient is φ = 42124230.

The previous prime is 42124213. The next prime is 42124279. The reversal of 42124231 is 13242124.

Together with previous prime (42124213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42124231 - 2¹⁵ = 42091463 is a prime.

It is a super-2 number, since 2×42124231² = 3548901674682722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42124199 and 42124208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42124531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062115 + 21062116.

It is an arithmetic number, because the mean of its divisors is an integer number (21062116).

Almost surely, 2^42124231 is an apocalyptic number.

42124231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124231 is an equidigital number, since it uses as much as digits as its factorization.

42124231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 42124231 is about 6490.3182510567. The cubic root of 42124231 is about 347.9450495655.

Adding to 42124231 its reverse (13242124), we get a palindrome (55366355).

The spelling of 42124231 in words is "forty-two million, one hundred twenty-four thousand, two hundred thirty-one".