420702551 has 2 divisors, whose sum is σ = 420702552. Its totient is φ = 420702550.

The previous prime is 420702539. The next prime is 420702563. The reversal of 420702551 is 155207024.

It is a balanced prime because it is at equal distance from previous prime (420702539) and next prime (420702563).

It is a cyclic number.

It is not a de Polignac number, because 420702551 - 2⁶ = 420702487 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 420702551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420702151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210351275 + 210351276.

It is an arithmetic number, because the mean of its divisors is an integer number (210351276).

Almost surely, 2^420702551 is an apocalyptic number.

420702551 is a deficient number, since it is larger than the sum of its proper divisors (1).

420702551 is an equidigital number, since it uses as much as digits as its factorization.

420702551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 420702551 is about 20511.0348593141. The cubic root of 420702551 is about 749.3045707776.

Adding to 420702551 its reverse (155207024), we get a palindrome (575909575).

The spelling of 420702551 in words is "four hundred twenty million, seven hundred two thousand, five hundred fifty-one".