420977 has 2 divisors, whose sum is σ = 420978. Its totient is φ = 420976.

The previous prime is 420967. The next prime is 420997. The reversal of 420977 is 779024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 6241 = 644^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 420977 - 2¹⁰ = 419953 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (420967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210488 + 210489.

It is an arithmetic number, because the mean of its divisors is an integer number (210489).

2⁴²⁰⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

420977 is a deficient number, since it is larger than the sum of its proper divisors (1).

420977 is an equidigital number, since it uses as much as digits as its factorization.

420977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 420977 is about 648.8274038602. The cubic root of 420977 is about 74.9467473829.

The spelling of 420977 in words is "four hundred twenty thousand, nine hundred seventy-seven".