1241591279 has 4 divisors (see below), whose sum is σ = 1243232184. Its totient is φ = 1239950376.

The previous prime is 1241591269. The next prime is 1241591287. The reversal of 1241591279 is 9721951421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1241591279 - 2¹⁶ = 1241525743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241591249) 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, 819317 + ... + 820830.

It is an arithmetic number, because the mean of its divisors is an integer number (310808046).

Almost surely, 2^1241591279 is an apocalyptic number.

1241591279 is a deficient number, since it is larger than the sum of its proper divisors (1640905).

1241591279 is an equidigital number, since it uses as much as digits as its factorization.

1241591279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640904.

The product of its digits is 45360, while the sum is 41.

The square root of 1241591279 is about 35236.2211225892. The cubic root of 1241591279 is about 1074.7964363787.

The spelling of 1241591279 in words is "one billion, two hundred forty-one million, five hundred ninety-one thousand, two hundred seventy-nine".