1241216653 has 4 divisors (see below), whose sum is σ = 1241434080. Its totient is φ = 1240999228.

The previous prime is 1241216651. The next prime is 1241216663. The reversal of 1241216653 is 3566121421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3566121421 = 877 ⋅4066273.

It is a cyclic number.

It is not a de Polignac number, because 1241216653 - 2¹ = 1241216651 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 (1241216651) 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, 99913 + ... + 111646.

It is an arithmetic number, because the mean of its divisors is an integer number (310358520).

Almost surely, 2^1241216653 is an apocalyptic number.

It is an amenable number.

1241216653 is a deficient number, since it is larger than the sum of its proper divisors (217427).

1241216653 is an equidigital number, since it uses as much as digits as its factorization.

1241216653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217426.

The product of its digits is 8640, while the sum is 31.

The square root of 1241216653 is about 35230.9047996216. The cubic root of 1241216653 is about 1074.6883258702.

The spelling of 1241216653 in words is "one billion, two hundred forty-one million, two hundred sixteen thousand, six hundred fifty-three".