42400733 has 2 divisors, whose sum is σ = 42400734. Its totient is φ = 42400732.

The previous prime is 42400717. The next prime is 42400741. The reversal of 42400733 is 33700424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29019769 + 13380964 = 5387^2 + 3658^2 .

It is a cyclic number.

It is not a de Polignac number, because 42400733 - 2⁴ = 42400717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42400699 and 42400708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42400793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200366 + 21200367.

It is an arithmetic number, because the mean of its divisors is an integer number (21200367).

Almost surely, 2^42400733 is an apocalyptic number.

It is an amenable number.

42400733 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400733 is an equidigital number, since it uses as much as digits as its factorization.

42400733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 42400733 is about 6511.5845229867. The cubic root of 42400733 is about 348.7046896681.

The spelling of 42400733 in words is "forty-two million, four hundred thousand, seven hundred thirty-three".