420149 has 2 divisors, whose sum is σ = 420150.
Its totient is φ = 420148.
The previous prime is 420103. The next prime is 420163. The reversal of 420149 is 941024.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 302500 + 117649 = 550^2 + 343^2
It is a cyclic number.
It is not a de Polignac number, because 420149 - 28 = 419893 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 420149.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420149.
It is not a weakly prime, because it can be changed into another prime (420349) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210074 + 210075.
It is an arithmetic number, because the mean of its divisors is an integer number (210075).
2420149 is an apocalyptic number.
It is an amenable number.
420149 is a deficient number, since it is larger than the sum of its proper divisors (1).
420149 is an equidigital number, since it uses as much as digits as its factorization.
420149 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 288, while the sum is 20.
The square root of 420149 is about 648.1890156428.
The cubic root of 420149 is about 74.8975787139.
The spelling of 420149 in words is "four hundred twenty thousand, one hundred forty-nine".