1243013045 has 8 divisors (see below), whose sum is σ = 1539732480. Its totient is φ = 962332560.

The previous prime is 1243013017. The next prime is 1243013047. The reversal of 1243013045 is 5403103421.

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

It is not a de Polignac number, because 1243013045 - 2¹⁶ = 1242947509 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243013045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243013047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4009565 + ... + 4009874.

It is an arithmetic number, because the mean of its divisors is an integer number (192466560).

Almost surely, 2^1243013045 is an apocalyptic number.

It is an amenable number.

1243013045 is a deficient number, since it is larger than the sum of its proper divisors (296719435).

1243013045 is an equidigital number, since it uses as much as digits as its factorization.

1243013045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8019475.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1243013045 is about 35256.3901300176. The cubic root of 1243013045 is about 1075.2065354023.

Adding to 1243013045 its reverse (5403103421), we get a palindrome (6646116466).

The spelling of 1243013045 in words is "one billion, two hundred forty-three million, thirteen thousand, forty-five".