1122600645 has 24 divisors (see below), whose sum is σ = 1947957336. Its totient is φ = 598069248.

The previous prime is 1122600631. The next prime is 1122600649. The reversal of 1122600645 is 5460062211.

1122600645 is a `hidden beast` number, since 1 + 12 + 2 + 6 + 0 + 0 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 330403329 + 792197316 = 18177^2 + 28146^2 .

It is not a de Polignac number, because 1122600645 - 2⁶ = 1122600581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122600649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29797 + ... + 55973.

It is an arithmetic number, because the mean of its divisors is an integer number (81164889).

Almost surely, 2^1122600645 is an apocalyptic number.

1122600645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1122600645 is a deficient number, since it is larger than the sum of its proper divisors (825356691).

1122600645 is a wasteful number, since it uses less digits than its factorization.

1122600645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27141 (or 27138 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1122600645 is about 33505.2330987265. The cubic root of 1122600645 is about 1039.3019986618.

Adding to 1122600645 its reverse (5460062211), we get a palindrome (6582662856).

The spelling of 1122600645 in words is "one billion, one hundred twenty-two million, six hundred thousand, six hundred forty-five".