1043248261 has 4 divisors (see below), whose sum is σ = 1138089024. Its totient is φ = 948407500.

The previous prime is 1043248243. The next prime is 1043248273. The reversal of 1043248261 is 1628423401.

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 1043248261 - 2⁵ = 1043248229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043248211) 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, 47420365 + ... + 47420386.

It is an arithmetic number, because the mean of its divisors is an integer number (284522256).

Almost surely, 2^1043248261 is an apocalyptic number.

1043248261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1043248261 is a deficient number, since it is larger than the sum of its proper divisors (94840763).

1043248261 is an equidigital number, since it uses as much as digits as its factorization.

1043248261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94840762.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1043248261 is about 32299.3538789865. The cubic root of 1043248261 is about 1014.2131172221.

The spelling of 1043248261 in words is "one billion, forty-three million, two hundred forty-eight thousand, two hundred sixty-one".