16420751 has 2 divisors, whose sum is σ = 16420752. Its totient is φ = 16420750.

The previous prime is 16420739. The next prime is 16420777. The reversal of 16420751 is 15702461.

It is an a-pointer prime, because the next prime (16420777) can be obtained adding 16420751 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16420751 - 2⁶ = 16420687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16420751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16420721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210375 + 8210376.

It is an arithmetic number, because the mean of its divisors is an integer number (8210376).

Almost surely, 2^16420751 is an apocalyptic number.

16420751 is a deficient number, since it is larger than the sum of its proper divisors (1).

16420751 is an equidigital number, since it uses as much as digits as its factorization.

16420751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 16420751 is about 4052.2525834405. The cubic root of 16420751 is about 254.1739307190.

It can be divided in two parts, 16420 and 751, that added together give a palindrome (17171).

The spelling of 16420751 in words is "sixteen million, four hundred twenty thousand, seven hundred fifty-one".