420003457 has 2 divisors, whose sum is σ = 420003458. Its totient is φ = 420003456.

The previous prime is 420003443. The next prime is 420003481. The reversal of 420003457 is 754300024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407393856 + 12609601 = 20184^2 + 3551^2 .

It is a cyclic number.

It is not a de Polignac number, because 420003457 - 2¹⁵ = 419970689 is a prime.

It is a super-3 number, since 3×420003457³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (420003257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210001728 + 210001729.

It is an arithmetic number, because the mean of its divisors is an integer number (210001729).

Almost surely, 2^420003457 is an apocalyptic number.

It is an amenable number.

420003457 is a deficient number, since it is larger than the sum of its proper divisors (1).

420003457 is an equidigital number, since it uses as much as digits as its factorization.

420003457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 420003457 is about 20493.9858739094. The cubic root of 420003457 is about 748.8892934013.

The spelling of 420003457 in words is "four hundred twenty million, three thousand, four hundred fifty-seven".