1420023257 has 2 divisors, whose sum is σ = 1420023258. Its totient is φ = 1420023256.

The previous prime is 1420023247. The next prime is 1420023301. The reversal of 1420023257 is 7523200241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753557401 + 666465856 = 27451^2 + 25816^2 .

It is an emirp because it is prime and its reverse (7523200241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420023257 - 2¹⁸ = 1419761113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1420023247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710011628 + 710011629.

It is an arithmetic number, because the mean of its divisors is an integer number (710011629).

Almost surely, 2^1420023257 is an apocalyptic number.

It is an amenable number.

1420023257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420023257 is an equidigital number, since it uses as much as digits as its factorization.

1420023257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 1420023257 is about 37683.1959499191. The cubic root of 1420023257 is about 1123.9970008848.

Adding to 1420023257 its reverse (7523200241), we get a palindrome (8943223498).

The spelling of 1420023257 in words is "one billion, four hundred twenty million, twenty-three thousand, two hundred fifty-seven".