1241248921 has 8 divisors (see below), whose sum is σ = 1355687424. Its totient is φ = 1127076720.

The previous prime is 1241248919. The next prime is 1241248937. The reversal of 1241248921 is 1298421421.

It is a happy number.

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

It is not a de Polignac number, because 1241248921 - 2¹ = 1241248919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241248951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56761 + ... + 75526.

It is an arithmetic number, because the mean of its divisors is an integer number (169460928).

Almost surely, 2^1241248921 is an apocalyptic number.

1241248921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241248921 is a deficient number, since it is larger than the sum of its proper divisors (114438503).

1241248921 is a wasteful number, since it uses less digits than its factorization.

1241248921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133151.

The product of its digits is 9216, while the sum is 34.

The square root of 1241248921 is about 35231.3627468482. The cubic root of 1241248921 is about 1074.6976387065.

The spelling of 1241248921 in words is "one billion, two hundred forty-one million, two hundred forty-eight thousand, nine hundred twenty-one".