145120511 has 6 divisors (see below), whose sum is σ = 146553840. Its totient is φ = 143701068.

The previous prime is 145120489. The next prime is 145120523. The reversal of 145120511 is 115021541.

It is a de Polignac number, because none of the positive numbers 2^k-145120511 is a prime.

It is a super-2 number, since 2×145120511² = 42119925425802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145120541) 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 5 ways as a sum of consecutive naturals, for example, 3770 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (24425640).

Almost surely, 2^145120511 is an apocalyptic number.

145120511 is a deficient number, since it is larger than the sum of its proper divisors (1433329).

145120511 is an equidigital number, since it uses as much as digits as its factorization.

145120511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885 (or 13782 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 145120511 is about 12046.5974864274. The cubic root of 145120511 is about 525.5042906545.

The spelling of 145120511 in words is "one hundred forty-five million, one hundred twenty thousand, five hundred eleven".