42435131 has 2 divisors, whose sum is σ = 42435132. Its totient is φ = 42435130.

The previous prime is 42435121. The next prime is 42435137. The reversal of 42435131 is 13153424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42435131 - 2¹⁸ = 42172987 is a prime.

It is a super-2 number, since 2×42435131² = 3601480685974322, 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 = 42435097 and 42435106.

It is not a weakly prime, because it can be changed into another prime (42435137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21217565 + 21217566.

It is an arithmetic number, because the mean of its divisors is an integer number (21217566).

Almost surely, 2^42435131 is an apocalyptic number.

42435131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42435131 is an equidigital number, since it uses as much as digits as its factorization.

42435131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 42435131 is about 6514.2252801081. The cubic root of 42435131 is about 348.7989608509.

Adding to 42435131 its reverse (13153424), we get a palindrome (55588555).

The spelling of 42435131 in words is "forty-two million, four hundred thirty-five thousand, one hundred thirty-one".