145045521 has 12 divisors (see below), whose sum is σ = 218619648. Its totient is φ = 92492664.

The previous prime is 145045519. The next prime is 145045531. The reversal of 145045521 is 125540541.

It is not a de Polignac number, because 145045521 - 2¹ = 145045519 is a prime.

It is a super-2 number, since 2×145045521² = 42076406324322882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145045531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350145 + ... + 350558.

It is an arithmetic number, because the mean of its divisors is an integer number (18218304).

Almost surely, 2^145045521 is an apocalyptic number.

It is an amenable number.

145045521 is a deficient number, since it is larger than the sum of its proper divisors (73574127).

145045521 is a wasteful number, since it uses less digits than its factorization.

145045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700732 (or 700729 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 145045521 is about 12043.4845871118. The cubic root of 145045521 is about 525.4137581808.

It can be divided in two parts, 1450 and 45521, that added together give a triangular number (46971 = T₃₀₆).

The spelling of 145045521 in words is "one hundred forty-five million, forty-five thousand, five hundred twenty-one".