1125618549 has 16 divisors (see below), whose sum is σ = 1637829120. Its totient is φ = 681957360.

The previous prime is 1125618541. The next prime is 1125618553. The reversal of 1125618549 is 9458165211.

It is not a de Polignac number, because 1125618549 - 2³ = 1125618541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1125618549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125618541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165192 + ... + 171870.

It is an arithmetic number, because the mean of its divisors is an integer number (102364320).

Almost surely, 2^1125618549 is an apocalyptic number.

It is an amenable number.

1125618549 is a deficient number, since it is larger than the sum of its proper divisors (512210571).

1125618549 is a wasteful number, since it uses less digits than its factorization.

1125618549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800.

The product of its digits is 86400, while the sum is 42.

The square root of 1125618549 is about 33550.2391794753. The cubic root of 1125618549 is about 1040.2324890125.

The spelling of 1125618549 in words is "one billion, one hundred twenty-five million, six hundred eighteen thousand, five hundred forty-nine".