145161111 has 4 divisors (see below), whose sum is σ = 193548152. Its totient is φ = 96774072.

The previous prime is 145161109. The next prime is 145161143. The reversal of 145161111 is 111161541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111161541 = 3 ⋅37053847.

It is not a de Polignac number, because 145161111 - 2¹ = 145161109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145161161) 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 in 3 ways as a sum of consecutive naturals, for example, 24193516 + ... + 24193521.

It is an arithmetic number, because the mean of its divisors is an integer number (48387038).

Almost surely, 2^145161111 is an apocalyptic number.

145161111 is a deficient number, since it is larger than the sum of its proper divisors (48387041).

145161111 is an equidigital number, since it uses as much as digits as its factorization.

145161111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48387040.

The product of its digits is 120, while the sum is 21.

The square root of 145161111 is about 12048.2824917081. The cubic root of 145161111 is about 525.5532924226.

The spelling of 145161111 in words is "one hundred forty-five million, one hundred sixty-one thousand, one hundred eleven".