1243791441 has 6 divisors (see below), whose sum is σ = 1796587650. Its totient is φ = 829194288.

The previous prime is 1243791431. The next prime is 1243791443. The reversal of 1243791441 is 1441973421.

1243791441 is a `hidden beast` number, since 124 + 3 + 7 + 91 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 864360000 + 379431441 = 29400^2 + 19479^2 .

It is not a de Polignac number, because 1243791441 - 2⁶ = 1243791377 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1243791396 and 1243791405.

It is not an unprimeable number, because it can be changed into a prime (1243791443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69099516 + ... + 69099533.

It is an arithmetic number, because the mean of its divisors is an integer number (299431275).

Almost surely, 2^1243791441 is an apocalyptic number.

It is an amenable number.

1243791441 is a deficient number, since it is larger than the sum of its proper divisors (552796209).

1243791441 is a wasteful number, since it uses less digits than its factorization.

1243791441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138199055 (or 138199052 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1243791441 is about 35267.4274791911. The cubic root of 1243791441 is about 1075.4309261355.

The spelling of 1243791441 in words is "one billion, two hundred forty-three million, seven hundred ninety-one thousand, four hundred forty-one".