1545040249 has 9 divisors (see below), whose sum is σ = 1616082223. Its totient is φ = 1476999832.

The previous prime is 1545040243. The next prime is 1545040307. The reversal of 1545040249 is 9420405451.

The square root of 1545040249 is 39307.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 290463849 + 1254576400 = 17043^2 + 35420^2 .

It is not a de Polignac number, because 1545040249 - 2³ = 1545040241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545040241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 903207 + ... + 904915.

Almost surely, 2^1545040249 is an apocalyptic number.

1545040249 is the 39307-th square number.

1545040249 is the 19654-th centered octagonal number.

It is an amenable number.

1545040249 is a deficient number, since it is larger than the sum of its proper divisors (71041974).

1545040249 is an frugal number, since it uses more digits than its factorization.

1545040249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The cubic root of 1545040249 is about 1156.0588227811.

The spelling of 1545040249 in words is "one billion, five hundred forty-five million, forty thousand, two hundred forty-nine".