1121538549 has 8 divisors (see below), whose sum is σ = 1497085632. Its totient is φ = 746841920.

The previous prime is 1121538529. The next prime is 1121538563. The reversal of 1121538549 is 9458351211.

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 1121538549 - 2¹¹ = 1121536501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121538529) 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, 209529 + ... + 214814.

It is an arithmetic number, because the mean of its divisors is an integer number (187135704).

Almost surely, 2^1121538549 is an apocalyptic number.

It is an amenable number.

1121538549 is a deficient number, since it is larger than the sum of its proper divisors (375547083).

1121538549 is an equidigital number, since it uses as much as digits as its factorization.

1121538549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425227.

The product of its digits is 43200, while the sum is 39.

The square root of 1121538549 is about 33489.3796448964. The cubic root of 1121538549 is about 1038.9741329455.

The spelling of 1121538549 in words is "one billion, one hundred twenty-one million, five hundred thirty-eight thousand, five hundred forty-nine".