420202457 has 2 divisors, whose sum is σ = 420202458. Its totient is φ = 420202456.

The previous prime is 420202441. The next prime is 420202463. The reversal of 420202457 is 754202024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219158416 + 201044041 = 14804^2 + 14179^2 .

It is a cyclic number.

It is not a de Polignac number, because 420202457 - 2⁴ = 420202441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420207457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210101228 + 210101229.

It is an arithmetic number, because the mean of its divisors is an integer number (210101229).

Almost surely, 2^420202457 is an apocalyptic number.

It is an amenable number.

420202457 is a deficient number, since it is larger than the sum of its proper divisors (1).

420202457 is an equidigital number, since it uses as much as digits as its factorization.

420202457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 420202457 is about 20498.8403818362. The cubic root of 420202457 is about 749.0075507126.

The spelling of 420202457 in words is "four hundred twenty million, two hundred two thousand, four hundred fifty-seven".