42194437 has 2 divisors, whose sum is σ = 42194438. Its totient is φ = 42194436.

The previous prime is 42194431. The next prime is 42194473. The reversal of 42194437 is 73449124.

It is a happy number.

Together with next prime (42194473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21818241 + 20376196 = 4671^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 42194437 - 2¹⁹ = 41670149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42194431) 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, 21097218 + 21097219.

It is an arithmetic number, because the mean of its divisors is an integer number (21097219).

Almost surely, 2^42194437 is an apocalyptic number.

It is an amenable number.

42194437 is a deficient number, since it is larger than the sum of its proper divisors (1).

42194437 is an equidigital number, since it uses as much as digits as its factorization.

42194437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 42194437 is about 6495.7245169419. The cubic root of 42194437 is about 348.1382421874.

The spelling of 42194437 in words is "forty-two million, one hundred ninety-four thousand, four hundred thirty-seven".