402026123 has 2 divisors, whose sum is σ = 402026124. Its totient is φ = 402026122.

The previous prime is 402026087. The next prime is 402026143. The reversal of 402026123 is 321620204.

It is an a-pointer prime, because the next prime (402026143) can be obtained adding 402026123 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402026123 is a prime.

It is a super-2 number, since 2×402026123² = 323250007148822258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402026095 and 402026104.

It is not a weakly prime, because it can be changed into another prime (402026143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201013061 + 201013062.

It is an arithmetic number, because the mean of its divisors is an integer number (201013062).

Almost surely, 2^402026123 is an apocalyptic number.

402026123 is a deficient number, since it is larger than the sum of its proper divisors (1).

402026123 is an equidigital number, since it uses as much as digits as its factorization.

402026123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 402026123 is about 20050.5890935902. The cubic root of 402026123 is about 738.0482552789.

Adding to 402026123 its reverse (321620204), we get a palindrome (723646327).

The spelling of 402026123 in words is "four hundred two million, twenty-six thousand, one hundred twenty-three".