1243045441 has 4 divisors (see below), whose sum is σ = 1356049584. Its totient is φ = 1130041300.

The previous prime is 1243045367. The next prime is 1243045477. The reversal of 1243045441 is 1445403421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243045441 - 2¹¹ = 1243043393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243040441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56502055 + ... + 56502076.

It is an arithmetic number, because the mean of its divisors is an integer number (339012396).

Almost surely, 2^1243045441 is an apocalyptic number.

1243045441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243045441 is a deficient number, since it is larger than the sum of its proper divisors (113004143).

1243045441 is a wasteful number, since it uses less digits than its factorization.

1243045441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113004142.

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

The square root of 1243045441 is about 35256.8495614682. The cubic root of 1243045441 is about 1075.2158761700.

Adding to 1243045441 its reverse (1445403421), we get a palindrome (2688448862).

The spelling of 1243045441 in words is "one billion, two hundred forty-three million, forty-five thousand, four hundred forty-one".