145239211 has 16 divisors (see below), whose sum is σ = 174333600. Its totient is φ = 119536128.

The previous prime is 145239197. The next prime is 145239223. The reversal of 145239211 is 112932541.

It is a cyclic number.

It is not a de Polignac number, because 145239211 - 2¹¹ = 145237163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145239211.

It is not an unprimeable number, because it can be changed into a prime (145239271) 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, 13096 + ... + 21493.

It is an arithmetic number, because the mean of its divisors is an integer number (10895850).

Almost surely, 2^145239211 is an apocalyptic number.

145239211 is a deficient number, since it is larger than the sum of its proper divisors (29094389).

145239211 is a wasteful number, since it uses less digits than its factorization.

145239211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34638.

The product of its digits is 2160, while the sum is 28.

The square root of 145239211 is about 12051.5231817393. The cubic root of 145239211 is about 525.6475287574.

The spelling of 145239211 in words is "one hundred forty-five million, two hundred thirty-nine thousand, two hundred eleven".