1121617645 has 8 divisors (see below), whose sum is σ = 1356539904. Its totient is φ = 890228304.

The previous prime is 1121617643. The next prime is 1121617661. The reversal of 1121617645 is 5467161211.

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 1121617645 - 2¹ = 1121617643 is a prime.

It is a super-3 number, since 3×1121617645³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121617645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121617643) 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, 882529 + ... + 883798.

It is an arithmetic number, because the mean of its divisors is an integer number (169567488).

Almost surely, 2^1121617645 is an apocalyptic number.

It is an amenable number.

1121617645 is a deficient number, since it is larger than the sum of its proper divisors (234922259).

1121617645 is a wasteful number, since it uses less digits than its factorization.

1121617645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766459.

The product of its digits is 10080, while the sum is 34.

The square root of 1121617645 is about 33490.5605357689. The cubic root of 1121617645 is about 1038.9985567653.

Adding to 1121617645 its reverse (5467161211), we get a palindrome (6588778856).

The spelling of 1121617645 in words is "one billion, one hundred twenty-one million, six hundred seventeen thousand, six hundred forty-five".