420020149 has 2 divisors, whose sum is σ = 420020150. Its totient is φ = 420020148.

The previous prime is 420020131. The next prime is 420020171. The reversal of 420020149 is 941020024.

It is an a-pointer prime, because the next prime (420020171) can be obtained adding 420020149 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412496100 + 7524049 = 20310^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 420020149 - 2¹³ = 420011957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420020449) 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, 210010074 + 210010075.

It is an arithmetic number, because the mean of its divisors is an integer number (210010075).

Almost surely, 2^420020149 is an apocalyptic number.

It is an amenable number.

420020149 is a deficient number, since it is larger than the sum of its proper divisors (1).

420020149 is an equidigital number, since it uses as much as digits as its factorization.

420020149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 420020149 is about 20494.3931112878. The cubic root of 420020149 is about 748.8992141883.

The spelling of 420020149 in words is "four hundred twenty million, twenty thousand, one hundred forty-nine".