1241420209 has 4 divisors (see below), whose sum is σ = 1241532916. Its totient is φ = 1241307504.

The previous prime is 1241420207. The next prime is 1241420231. The reversal of 1241420209 is 9020241421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 803439025 + 437981184 = 28345^2 + 20928^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241420209 - 2¹ = 1241420207 is a prime.

It is a super-2 number, since 2×1241420209² = 3082248270627207362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241420207) 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 in 3 ways as a sum of consecutive naturals, for example, 37794 + ... + 62539.

It is an arithmetic number, because the mean of its divisors is an integer number (310383229).

Almost surely, 2^1241420209 is an apocalyptic number.

It is an amenable number.

1241420209 is a deficient number, since it is larger than the sum of its proper divisors (112707).

1241420209 is a wasteful number, since it uses less digits than its factorization.

1241420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112706.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1241420209 is about 35233.7935652691. The cubic root of 1241420209 is about 1074.7470712683.

It can be divided in two parts, 12414 and 20209, that added together give a palindrome (32623).

The spelling of 1241420209 in words is "one billion, two hundred forty-one million, four hundred twenty thousand, two hundred nine".