145420111 has 2 divisors, whose sum is σ = 145420112. Its totient is φ = 145420110.

The previous prime is 145420069. The next prime is 145420117. The reversal of 145420111 is 111024541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145420111 - 2⁷ = 145419983 is a prime.

It is a super-2 number, since 2×145420111² = 42294017366504642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145420117) 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, 72710055 + 72710056.

It is an arithmetic number, because the mean of its divisors is an integer number (72710056).

Almost surely, 2^145420111 is an apocalyptic number.

145420111 is a deficient number, since it is larger than the sum of its proper divisors (1).

145420111 is an equidigital number, since it uses as much as digits as its factorization.

145420111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 145420111 is about 12059.0261215407. The cubic root of 145420111 is about 525.8656750498.

Adding to 145420111 its reverse (111024541), we get a palindrome (256444652).

The spelling of 145420111 in words is "one hundred forty-five million, four hundred twenty thousand, one hundred eleven".