1021420423 has 2 divisors, whose sum is σ = 1021420424. Its totient is φ = 1021420422.

The previous prime is 1021420369. The next prime is 1021420451. The reversal of 1021420423 is 3240241201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021420423 - 2⁹ = 1021419911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021420423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021420123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510710211 + 510710212.

It is an arithmetic number, because the mean of its divisors is an integer number (510710212).

Almost surely, 2^1021420423 is an apocalyptic number.

1021420423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021420423 is an equidigital number, since it uses as much as digits as its factorization.

1021420423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1021420423 is about 31959.6686935268. The cubic root of 1021420423 is about 1007.0897575498.

Adding to 1021420423 its reverse (3240241201), we get a palindrome (4261661624).

The spelling of 1021420423 in words is "one billion, twenty-one million, four hundred twenty thousand, four hundred twenty-three".