145130121 has 24 divisors (see below), whose sum is σ = 212784000. Its totient is φ = 95310432.

The previous prime is 145130101. The next prime is 145130129. The reversal of 145130121 is 121031541.

It is not a de Polignac number, because 145130121 - 2¹³ = 145121929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145130094 and 145130103.

It is not an unprimeable number, because it can be changed into a prime (145130129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234150 + ... + 234768.

It is an arithmetic number, because the mean of its divisors is an integer number (8866000).

Almost surely, 2^145130121 is an apocalyptic number.

It is an amenable number.

145130121 is a deficient number, since it is larger than the sum of its proper divisors (67653879).

145130121 is a wasteful number, since it uses less digits than its factorization.

145130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 145130121 is about 12046.9963476379. The cubic root of 145130121 is about 525.5158901744.

Adding to 145130121 its reverse (121031541), we get a palindrome (266161662).

The spelling of 145130121 in words is "one hundred forty-five million, one hundred thirty thousand, one hundred twenty-one".