1241069491 has 4 divisors (see below), whose sum is σ = 1241223984. Its totient is φ = 1240915000.

The previous prime is 1241069419. The next prime is 1241069509. The reversal of 1241069491 is 1949601421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1949601421 = 79 ⋅24678499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241069491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1241069491.

It is not an unprimeable number, because it can be changed into a prime (1241069891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64495 + ... + 81496.

It is an arithmetic number, because the mean of its divisors is an integer number (310305996).

Almost surely, 2^1241069491 is an apocalyptic number.

1241069491 is a deficient number, since it is larger than the sum of its proper divisors (154493).

1241069491 is an equidigital number, since it uses as much as digits as its factorization.

1241069491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154492.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1241069491 is about 35228.8162020809. The cubic root of 1241069491 is about 1074.6458515410.

The spelling of 1241069491 in words is "one billion, two hundred forty-one million, sixty-nine thousand, four hundred ninety-one".