420141551 has 2 divisors, whose sum is σ = 420141552. Its totient is φ = 420141550.

The previous prime is 420141541. The next prime is 420141559. The reversal of 420141551 is 155141024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420141551 - 2⁶ = 420141487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420141559) 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, 210070775 + 210070776.

It is an arithmetic number, because the mean of its divisors is an integer number (210070776).

Almost surely, 2^420141551 is an apocalyptic number.

420141551 is a deficient number, since it is larger than the sum of its proper divisors (1).

420141551 is an equidigital number, since it uses as much as digits as its factorization.

420141551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 420141551 is about 20497.3547317697. The cubic root of 420141551 is about 748.9713608098.

Adding to 420141551 its reverse (155141024), we get a palindrome (575282575).

The spelling of 420141551 in words is "four hundred twenty million, one hundred forty-one thousand, five hundred fifty-one".