1121656249 has 8 divisors (see below), whose sum is σ = 1337627520. Its totient is φ = 919618656.

The previous prime is 1121656219. The next prime is 1121656267. The reversal of 1121656249 is 9426561211.

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 1121656249 - 2²³ = 1113267641 is a prime.

It is a super-2 number, since 2×1121656249² = 2516225481841500002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121656219) 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 7 ways as a sum of consecutive naturals, for example, 3483244 + ... + 3483565.

It is an arithmetic number, because the mean of its divisors is an integer number (167203440).

Almost surely, 2^1121656249 is an apocalyptic number.

It is an amenable number.

1121656249 is a deficient number, since it is larger than the sum of its proper divisors (215971271).

1121656249 is an equidigital number, since it uses as much as digits as its factorization.

1121656249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966839.

The product of its digits is 25920, while the sum is 37.

The square root of 1121656249 is about 33491.1368723129. The cubic root of 1121656249 is about 1039.0104767633.

The spelling of 1121656249 in words is "one billion, one hundred twenty-one million, six hundred fifty-six thousand, two hundred forty-nine".