145111521 has 8 divisors (see below), whose sum is σ = 198711424. Its totient is φ = 94126320.

The previous prime is 145111487. The next prime is 145111523. The reversal of 145111521 is 125111541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145111521 - 2⁶ = 145111457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145111523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653545 + ... + 653766.

It is an arithmetic number, because the mean of its divisors is an integer number (24838928).

Almost surely, 2^145111521 is an apocalyptic number.

It is an amenable number.

145111521 is a deficient number, since it is larger than the sum of its proper divisors (53599903).

145111521 is a wasteful number, since it uses less digits than its factorization.

145111521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307351.

The product of its digits is 200, while the sum is 21.

The square root of 145111521 is about 12046.2243462423. The cubic root of 145111521 is about 525.4934390272.

The spelling of 145111521 in words is "one hundred forty-five million, one hundred eleven thousand, five hundred twenty-one".