1121309145 has 24 divisors (see below), whose sum is σ = 2120294592. Its totient is φ = 543664800.

The previous prime is 1121309129. The next prime is 1121309183. The reversal of 1121309145 is 5419031211.

It is a happy number.

It is not a de Polignac number, because 1121309145 - 2⁴ = 1121309129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1132141 + ... + 1133130.

It is an arithmetic number, because the mean of its divisors is an integer number (88345608).

Almost surely, 2^1121309145 is an apocalyptic number.

1121309145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121309145 is a deficient number, since it is larger than the sum of its proper divisors (998985447).

1121309145 is a wasteful number, since it uses less digits than its factorization.

1121309145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265293 (or 2265290 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1121309145 is about 33485.9544436171. The cubic root of 1121309145 is about 1038.9032894675.

The spelling of 1121309145 in words is "one billion, one hundred twenty-one million, three hundred nine thousand, one hundred forty-five".