42004751 has 2 divisors, whose sum is σ = 42004752. Its totient is φ = 42004750.

The previous prime is 42004741. The next prime is 42004769. The reversal of 42004751 is 15740024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42004751 - 2¹⁸ = 41742607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42004741) 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, 21002375 + 21002376.

It is an arithmetic number, because the mean of its divisors is an integer number (21002376).

Almost surely, 2^42004751 is an apocalyptic number.

42004751 is a deficient number, since it is larger than the sum of its proper divisors (1).

42004751 is an equidigital number, since it uses as much as digits as its factorization.

42004751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42004751 is about 6481.1072356504. The cubic root of 42004751 is about 347.6157708219.

Adding to 42004751 its reverse (15740024), we get a palindrome (57744775).

The spelling of 42004751 in words is "forty-two million, four thousand, seven hundred fifty-one".