145504549 has 8 divisors (see below), whose sum is σ = 148584600. Its totient is φ = 142454016.

The previous prime is 145504537. The next prime is 145504589. The reversal of 145504549 is 945405541.

It can be written as a sum of positive squares in 4 ways, for example, as 53919649 + 91584900 = 7343^2 + 9570^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145504549 - 2⁵ = 145504517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145504519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727 + ... + 17275.

It is an arithmetic number, because the mean of its divisors is an integer number (18573075).

Almost surely, 2^145504549 is an apocalyptic number.

It is an amenable number.

145504549 is a deficient number, since it is larger than the sum of its proper divisors (3080051).

145504549 is a wasteful number, since it uses less digits than its factorization.

145504549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14759.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 145504549 is about 12062.5266424576. The cubic root of 145504549 is about 525.9674364320.

The spelling of 145504549 in words is "one hundred forty-five million, five hundred four thousand, five hundred forty-nine".