420154457 has 2 divisors, whose sum is σ = 420154458. Its totient is φ = 420154456.

The previous prime is 420154421. The next prime is 420154463. The reversal of 420154457 is 754451024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359064601 + 61089856 = 18949^2 + 7816^2 .

It is a cyclic number.

It is not a de Polignac number, because 420154457 - 2⁶ = 420154393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420154417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210077228 + 210077229.

It is an arithmetic number, because the mean of its divisors is an integer number (210077229).

Almost surely, 2^420154457 is an apocalyptic number.

It is an amenable number.

420154457 is a deficient number, since it is larger than the sum of its proper divisors (1).

420154457 is an equidigital number, since it uses as much as digits as its factorization.

420154457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 420154457 is about 20497.6695504635. The cubic root of 420154457 is about 748.9790297533.

The spelling of 420154457 in words is "four hundred twenty million, one hundred fifty-four thousand, four hundred fifty-seven".