1121904065 has 16 divisors (see below), whose sum is σ = 1356264000. Its totient is φ = 890890560.

The previous prime is 1121904059. The next prime is 1121904071. The reversal of 1121904065 is 5604091211.

It is an interprime number because it is at equal distance from previous prime (1121904059) and next prime (1121904071).

It is a de Polignac number, because none of the positive numbers 2^k-1121904065 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747686 + ... + 749184.

It is an arithmetic number, because the mean of its divisors is an integer number (84766500).

Almost surely, 2^1121904065 is an apocalyptic number.

It is an amenable number.

1121904065 is a deficient number, since it is larger than the sum of its proper divisors (234359935).

1121904065 is a wasteful number, since it uses less digits than its factorization.

1121904065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1121904065 is about 33494.8363930920. The cubic root of 1121904065 is about 1039.0869899434.

Adding to 1121904065 its reverse (5604091211), we get a palindrome (6725995276).

The spelling of 1121904065 in words is "one billion, one hundred twenty-one million, nine hundred four thousand, sixty-five".