1260543645 has 24 divisors (see below), whose sum is σ = 2191992192. Its totient is φ = 670120800.

The previous prime is 1260543637. The next prime is 1260543649. The reversal of 1260543645 is 5463450621.

1260543645 is a `hidden beast` number, since 1 + 2 + 6 + 0 + 5 + 4 + 3 + 645 = 666.

It is not a de Polignac number, because 1260543645 - 2³ = 1260543637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260543649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31041 + ... + 59030.

It is an arithmetic number, because the mean of its divisors is an integer number (91333008).

Almost surely, 2^1260543645 is an apocalyptic number.

1260543645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1260543645 is a deficient number, since it is larger than the sum of its proper divisors (931448547).

1260543645 is a wasteful number, since it uses less digits than its factorization.

1260543645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90393 (or 90390 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1260543645 is about 35504.1356041800. The cubic root of 1260543645 is about 1080.2376148987.

The spelling of 1260543645 in words is "one billion, two hundred sixty million, five hundred forty-three thousand, six hundred forty-five".