145144521 has 16 divisors (see below), whose sum is σ = 227678400. Its totient is φ = 91070784.

The previous prime is 145144501. The next prime is 145144523. The reversal of 145144521 is 125441541.

145144521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145144521 - 2¹⁸ = 144882377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (145144523) 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, 157651 + ... + 158568.

It is an arithmetic number, because the mean of its divisors is an integer number (14229900).

Almost surely, 2^145144521 is an apocalyptic number.

It is an amenable number.

145144521 is a deficient number, since it is larger than the sum of its proper divisors (82533879).

145144521 is a wasteful number, since it uses less digits than its factorization.

145144521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316245 (or 316239 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 145144521 is about 12047.5939921629. The cubic root of 145144521 is about 525.5332703904.

The spelling of 145144521 in words is "one hundred forty-five million, one hundred forty-four thousand, five hundred twenty-one".