145121133 has 16 divisors (see below), whose sum is σ = 200508480. Its totient is φ = 93252096.

The previous prime is 145121113. The next prime is 145121147. The reversal of 145121133 is 331121541.

It is not a de Polignac number, because 145121133 - 2¹⁴ = 145104749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145121113) 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, 70941 + ... + 72957.

It is an arithmetic number, because the mean of its divisors is an integer number (12531780).

Almost surely, 2^145121133 is an apocalyptic number.

It is an amenable number.

145121133 is a deficient number, since it is larger than the sum of its proper divisors (55387347).

145121133 is a wasteful number, since it uses less digits than its factorization.

145121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876.

The product of its digits is 360, while the sum is 21.

The square root of 145121133 is about 12046.6233028181. The cubic root of 145121133 is about 525.5050414402.

Adding to 145121133 its reverse (331121541), we get a palindrome (476242674).

It can be divided in two parts, 145 and 121133, that added together give a triangular number (121278 = T₄₉₂).

The spelling of 145121133 in words is "one hundred forty-five million, one hundred twenty-one thousand, one hundred thirty-three".