42291433 has 2 divisors, whose sum is σ = 42291434. Its totient is φ = 42291432.

The previous prime is 42291421. The next prime is 42291437. The reversal of 42291433 is 33419224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42029289 + 262144 = 6483^2 + 512^2 .

It is a cyclic number.

It is not a de Polignac number, because 42291433 - 2⁵ = 42291401 is a prime.

It is not a weakly prime, because it can be changed into another prime (42291437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21145716 + 21145717.

It is an arithmetic number, because the mean of its divisors is an integer number (21145717).

Almost surely, 2^42291433 is an apocalyptic number.

It is an amenable number.

42291433 is a deficient number, since it is larger than the sum of its proper divisors (1).

42291433 is an equidigital number, since it uses as much as digits as its factorization.

42291433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 42291433 is about 6503.1863728483. The cubic root of 42291433 is about 348.4048031938.

It can be divided in two parts, 42291 and 433, that added together give a palindrome (42724).

The spelling of 42291433 in words is "forty-two million, two hundred ninety-one thousand, four hundred thirty-three".