1241663621 has 4 divisors (see below), whose sum is σ = 1354542144. Its totient is φ = 1128785100.

The previous prime is 1241663609. The next prime is 1241663641. The reversal of 1241663621 is 1263661421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1241663621 - 2³⁰ = 167921797 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 (1241663641) 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, 56439245 + ... + 56439266.

It is an arithmetic number, because the mean of its divisors is an integer number (338635536).

Almost surely, 2^1241663621 is an apocalyptic number.

1241663621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241663621 is a deficient number, since it is larger than the sum of its proper divisors (112878523).

1241663621 is a wasteful number, since it uses less digits than its factorization.

1241663621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112878522.

The product of its digits is 10368, while the sum is 32.

The square root of 1241663621 is about 35237.2476365564. The cubic root of 1241663621 is about 1074.8173105088.

The spelling of 1241663621 in words is "one billion, two hundred forty-one million, six hundred sixty-three thousand, six hundred twenty-one".