1213043345 has 16 divisors (see below), whose sum is σ = 1522962432. Its totient is φ = 925784640.

The previous prime is 1213043329. The next prime is 1213043399. The reversal of 1213043345 is 5433403121.

It is not a de Polignac number, because 1213043345 - 2⁴ = 1213043329 is a prime.

It is a Duffinian number.

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, 30275 + ... + 57815.

It is an arithmetic number, because the mean of its divisors is an integer number (95185152).

Almost surely, 2^1213043345 is an apocalyptic number.

It is an amenable number.

1213043345 is a deficient number, since it is larger than the sum of its proper divisors (309919087).

1213043345 is a wasteful number, since it uses less digits than its factorization.

1213043345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27952.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1213043345 is about 34828.7717986150. The cubic root of 1213043345 is about 1066.4948759255.

Adding to 1213043345 its reverse (5433403121), we get a palindrome (6646446466).

The spelling of 1213043345 in words is "one billion, two hundred thirteen million, forty-three thousand, three hundred forty-five".