1243441045 has 32 divisors (see below), whose sum is σ = 1862818560. Its totient is φ = 774090240.

The previous prime is 1243441027. The next prime is 1243441057. The reversal of 1243441045 is 5401443421.

It is a de Polignac number, because none of the positive numbers 2^k-1243441045 is a prime.

It is a super-2 number, since 2×1243441045² = 3092291264781384050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365211 + ... + 368599.

It is an arithmetic number, because the mean of its divisors is an integer number (58213080).

Almost surely, 2^1243441045 is an apocalyptic number.

It is an amenable number.

1243441045 is a deficient number, since it is larger than the sum of its proper divisors (619377515).

1243441045 is a wasteful number, since it uses less digits than its factorization.

1243441045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1243441045 is about 35262.4594292571. The cubic root of 1243441045 is about 1075.3299279365.

Adding to 1243441045 its reverse (5401443421), we get a palindrome (6644884466).

The spelling of 1243441045 in words is "one billion, two hundred forty-three million, four hundred forty-one thousand, forty-five".