1213354545 has 32 divisors (see below), whose sum is σ = 2096744832. Its totient is φ = 595617792.

The previous prime is 1213354501. The next prime is 1213354613. The reversal of 1213354545 is 5454533121.

It is not a de Polignac number, because 1213354545 - 2⁹ = 1213354033 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60022 + ... + 77648.

It is an arithmetic number, because the mean of its divisors is an integer number (65523276).

Almost surely, 2^1213354545 is an apocalyptic number.

1213354545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213354545 is a deficient number, since it is larger than the sum of its proper divisors (883390287).

1213354545 is a wasteful number, since it uses less digits than its factorization.

1213354545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18001.

The product of its digits is 36000, while the sum is 33.

The square root of 1213354545 is about 34833.2390828071. The cubic root of 1213354545 is about 1066.5860693768.

Adding to 1213354545 its reverse (5454533121), we get a palindrome (6667887666).

The spelling of 1213354545 in words is "one billion, two hundred thirteen million, three hundred fifty-four thousand, five hundred forty-five".