1213545145 has 8 divisors (see below), whose sum is σ = 1456447104. Its totient is φ = 970707504.

The previous prime is 1213545131. The next prime is 1213545169. The reversal of 1213545145 is 5415453121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213545145 - 2¹³ = 1213536953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50512 + ... + 70558.

It is an arithmetic number, because the mean of its divisors is an integer number (182055888).

Almost surely, 2^1213545145 is an apocalyptic number.

It is an amenable number.

1213545145 is a deficient number, since it is larger than the sum of its proper divisors (242901959).

1213545145 is a wasteful number, since it uses less digits than its factorization.

1213545145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32159.

The product of its digits is 12000, while the sum is 31.

The square root of 1213545145 is about 34835.9748679436. The cubic root of 1213545145 is about 1066.6419147360.

Adding to 1213545145 its reverse (5415453121), we get a palindrome (6628998266).

The spelling of 1213545145 in words is "one billion, two hundred thirteen million, five hundred forty-five thousand, one hundred forty-five".