145139511 has 16 divisors (see below), whose sum is σ = 213788160. Its totient is φ = 86848320.

The previous prime is 145139507. The next prime is 145139531. The reversal of 145139511 is 115931541.

It is not a de Polignac number, because 145139511 - 2² = 145139507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145139531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25230 + ... + 30443.

It is an arithmetic number, because the mean of its divisors is an integer number (13361760).

Almost surely, 2^145139511 is an apocalyptic number.

145139511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145139511 is a deficient number, since it is larger than the sum of its proper divisors (68648649).

145139511 is a wasteful number, since it uses less digits than its factorization.

145139511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55766.

The product of its digits is 2700, while the sum is 30.

The square root of 145139511 is about 12047.3860650350. The cubic root of 145139511 is about 525.5272236540.

It can be divided in two parts, 145 and 139511, that added together give a triangular number (139656 = T₅₂₈).

The spelling of 145139511 in words is "one hundred forty-five million, one hundred thirty-nine thousand, five hundred eleven".