241891421 has 2 divisors, whose sum is σ = 241891422. Its totient is φ = 241891420.

The previous prime is 241891399. The next prime is 241891493. The reversal of 241891421 is 124198142.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204204100 + 37687321 = 14290^2 + 6139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241891421 is a prime.

It is a super-2 number, since 2×241891421² = 117022919106798482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241891921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120945710 + 120945711.

It is an arithmetic number, because the mean of its divisors is an integer number (120945711).

Almost surely, 2^241891421 is an apocalyptic number.

It is an amenable number.

241891421 is a deficient number, since it is larger than the sum of its proper divisors (1).

241891421 is an equidigital number, since it uses as much as digits as its factorization.

241891421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 32.

The square root of 241891421 is about 15552.8589333280. The cubic root of 241891421 is about 623.0747548324.

It can be divided in two parts, 2418 and 91421, that added together give a palindrome (93839).

The spelling of 241891421 in words is "two hundred forty-one million, eight hundred ninety-one thousand, four hundred twenty-one".