1248109261 has 8 divisors (see below), whose sum is σ = 1427074560. Its totient is φ = 1069309968.

The previous prime is 1248109253. The next prime is 1248109267. The reversal of 1248109261 is 1629018421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1248109261 - 2³ = 1248109253 is a prime.

It is a super-2 number, since 2×1248109261² = 3115553454787932242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248109267) 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, 24946 + ... + 55843.

It is an arithmetic number, because the mean of its divisors is an integer number (178384320).

Almost surely, 2^1248109261 is an apocalyptic number.

It is an amenable number.

1248109261 is a deficient number, since it is larger than the sum of its proper divisors (178965299).

1248109261 is an equidigital number, since it uses as much as digits as its factorization.

1248109261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83003.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1248109261 is about 35328.5898529788. The cubic root of 1248109261 is about 1076.6739411156.

The spelling of 1248109261 in words is "one billion, two hundred forty-eight million, one hundred nine thousand, two hundred sixty-one".