1221487483 has 4 divisors (see below), whose sum is σ = 1221636600. Its totient is φ = 1221338368.

The previous prime is 1221487481. The next prime is 1221487489. The reversal of 1221487483 is 3847841221.

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 1221487483 - 2¹ = 1221487481 is a prime.

It is a super-2 number, since 2×1221487483² = 2984063342251350578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221487481) 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, 61510 + ... + 78907.

It is an arithmetic number, because the mean of its divisors is an integer number (305409150).

Almost surely, 2^1221487483 is an apocalyptic number.

1221487483 is a deficient number, since it is larger than the sum of its proper divisors (149117).

1221487483 is an equidigital number, since it uses as much as digits as its factorization.

1221487483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149116.

The product of its digits is 86016, while the sum is 40.

The square root of 1221487483 is about 34949.7851638604. The cubic root of 1221487483 is about 1068.9638214822.

The spelling of 1221487483 in words is "one billion, two hundred twenty-one million, four hundred eighty-seven thousand, four hundred eighty-three".