1241831921 has 4 divisors (see below), whose sum is σ = 1354725744. Its totient is φ = 1128938100.

The previous prime is 1241831917. The next prime is 1241831933. The reversal of 1241831921 is 1291381421.

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 1241831921 - 2² = 1241831917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241830921) 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, 56446895 + ... + 56446916.

It is an arithmetic number, because the mean of its divisors is an integer number (338681436).

Almost surely, 2^1241831921 is an apocalyptic number.

1241831921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241831921 is a deficient number, since it is larger than the sum of its proper divisors (112893823).

1241831921 is a wasteful number, since it uses less digits than its factorization.

1241831921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112893822.

The product of its digits is 3456, while the sum is 32.

The square root of 1241831921 is about 35239.6356536216. The cubic root of 1241831921 is about 1074.8658699785.

The spelling of 1241831921 in words is "one billion, two hundred forty-one million, eight hundred thirty-one thousand, nine hundred twenty-one".