145051404521 has 4 divisors (see below), whose sum is σ = 146407025232. Its totient is φ = 143695783812.

The previous prime is 145051404457. The next prime is 145051404527. The reversal of 145051404521 is 125404150541.

It is a happy number.

145051404521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125404150541 = 2663 ⋅47091307.

It is a cyclic number.

It is not a de Polignac number, because 145051404521 - 2⁶ = 145051404457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145051404527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677810195 + ... + 677810408.

It is an arithmetic number, because the mean of its divisors is an integer number (36601756308).

Almost surely, 2^145051404521 is an apocalyptic number.

It is an amenable number.

145051404521 is a deficient number, since it is larger than the sum of its proper divisors (1355620711).

145051404521 is a wasteful number, since it uses less digits than its factorization.

145051404521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355620710.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 145051404521 in words is "one hundred forty-five billion, fifty-one million, four hundred four thousand, five hundred twenty-one".