1121225645 has 8 divisors (see below), whose sum is σ = 1376761056. Its totient is φ = 876120336.

The previous prime is 1121225627. The next prime is 1121225657. The reversal of 1121225645 is 5465221211.

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 1121225645 - 2¹⁶ = 1121160109 is a prime.

It is a super-3 number, since 3×1121225645³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2607287 + ... + 2607716.

It is an arithmetic number, because the mean of its divisors is an integer number (172095132).

Almost surely, 2^1121225645 is an apocalyptic number.

It is an amenable number.

1121225645 is a deficient number, since it is larger than the sum of its proper divisors (255535411).

1121225645 is an equidigital number, since it uses as much as digits as its factorization.

1121225645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215051.

The product of its digits is 4800, while the sum is 29.

The square root of 1121225645 is about 33484.7076290058. The cubic root of 1121225645 is about 1038.8775009867.

Adding to 1121225645 its reverse (5465221211), we get a palindrome (6586446856).

The spelling of 1121225645 in words is "one billion, one hundred twenty-one million, two hundred twenty-five thousand, six hundred forty-five".