1241991421 has 8 divisors (see below), whose sum is σ = 1413808704. Its totient is φ = 1079992320.

The previous prime is 1241991419. The next prime is 1241991461.

1241991421 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1241991421 - 2¹ = 1241991419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241991461) 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, 2454276 + ... + 2454781.

It is an arithmetic number, because the mean of its divisors is an integer number (176726088).

Almost surely, 2^1241991421 is an apocalyptic number.

1241991421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241991421 is a deficient number, since it is larger than the sum of its proper divisors (171817283).

1241991421 is a wasteful number, since it uses less digits than its factorization.

1241991421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909091.

The product of its digits is 5184, while the sum is 34.

The square root of 1241991421 is about 35241.8986577057. The cubic root of 1241991421 is about 1074.9118863419.

The spelling of 1241991421 in words is "one billion, two hundred forty-one million, nine hundred ninety-one thousand, four hundred twenty-one".