1121643153 has 16 divisors (see below), whose sum is σ = 1759440960. Its totient is φ = 703775808.

The previous prime is 1121643137. The next prime is 1121643157. The reversal of 1121643153 is 3513461211.

It is a happy number.

1121643153 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 643 + 15 + 3 = 666.

It is not a de Polignac number, because 1121643153 - 2⁴ = 1121643137 is a prime.

It is a super-3 number, since 3×1121643153³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1121643157) 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, 1221375 + ... + 1222292.

It is an arithmetic number, because the mean of its divisors is an integer number (109965060).

Almost surely, 2^1121643153 is an apocalyptic number.

It is an amenable number.

1121643153 is a deficient number, since it is larger than the sum of its proper divisors (637797807).

1121643153 is a wasteful number, since it uses less digits than its factorization.

1121643153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443693 (or 2443687 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1121643153 is about 33490.9413573283. The cubic root of 1121643153 is about 1039.0064330603.

The spelling of 1121643153 in words is "one billion, one hundred twenty-one million, six hundred forty-three thousand, one hundred fifty-three".