1642454111 has 2 divisors, whose sum is σ = 1642454112. Its totient is φ = 1642454110.

The previous prime is 1642454089. The next prime is 1642454119. The reversal of 1642454111 is 1114542461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642454111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642454119) 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, 821227055 + 821227056.

It is an arithmetic number, because the mean of its divisors is an integer number (821227056).

Almost surely, 2^1642454111 is an apocalyptic number.

1642454111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642454111 is an equidigital number, since it uses as much as digits as its factorization.

1642454111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 1642454111 is about 40527.2021116682. The cubic root of 1642454111 is about 1179.8616401501.

Adding to 1642454111 its reverse (1114542461), we get a palindrome (2756996572).

It can be divided in two parts, 164 and 2454111, that multiplied together give a palindrome (402474204).

The spelling of 1642454111 in words is "one billion, six hundred forty-two million, four hundred fifty-four thousand, one hundred eleven".