1445021111 has 2 divisors, whose sum is σ = 1445021112. Its totient is φ = 1445021110.

The previous prime is 1445021101. The next prime is 1445021129. The reversal of 1445021111 is 1111205441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1445021111 - 2⁶ = 1445021047 is a prime.

It is a super-2 number, since 2×1445021111² = 4176172022471348642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722510555 + 722510556.

It is an arithmetic number, because the mean of its divisors is an integer number (722510556).

Almost surely, 2^1445021111 is an apocalyptic number.

1445021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445021111 is an equidigital number, since it uses as much as digits as its factorization.

1445021111 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 20.

The square root of 1445021111 is about 38013.4332966650. The cubic root of 1445021111 is about 1130.5542249561.

Adding to 1445021111 its reverse (1111205441), we get a palindrome (2556226552).

The spelling of 1445021111 in words is "one billion, four hundred forty-five million, twenty-one thousand, one hundred eleven".