420026731 has 2 divisors, whose sum is σ = 420026732. Its totient is φ = 420026730.

The previous prime is 420026707. The next prime is 420026767. The reversal of 420026731 is 137620024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420026731 - 2⁷ = 420026603 is a prime.

It is a super-2 number, since 2×420026731² = 352844909509092722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420026696 and 420026705.

It is not a weakly prime, because it can be changed into another prime (420026771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210013365 + 210013366.

It is an arithmetic number, because the mean of its divisors is an integer number (210013366).

Almost surely, 2^420026731 is an apocalyptic number.

420026731 is a deficient number, since it is larger than the sum of its proper divisors (1).

420026731 is an equidigital number, since it uses as much as digits as its factorization.

420026731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 420026731 is about 20494.5536911639. The cubic root of 420026731 is about 748.9031260870.

Adding to 420026731 its reverse (137620024), we get a palindrome (557646755).

The spelling of 420026731 in words is "four hundred twenty million, twenty-six thousand, seven hundred thirty-one".