1224521081 has 8 divisors (see below), whose sum is σ = 1460298624. Its totient is φ = 1003955040.

The previous prime is 1224521069. The next prime is 1224521083. The reversal of 1224521081 is 1801254221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224521081 is a prime.

It is a super-2 number, since 2×1224521081² = 2998903755626817122, which contains 22 as substring.

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 1224521081.

It is not an unprimeable number, because it can be changed into a prime (1224521083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3802700 + ... + 3803021.

It is an arithmetic number, because the mean of its divisors is an integer number (182537328).

Almost surely, 2^1224521081 is an apocalyptic number.

It is an amenable number.

1224521081 is a deficient number, since it is larger than the sum of its proper divisors (235777543).

1224521081 is an equidigital number, since it uses as much as digits as its factorization.

1224521081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605751.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1224521081 is about 34993.1576311713. The cubic root of 1224521081 is about 1069.8480236593.

The spelling of 1224521081 in words is "one billion, two hundred twenty-four million, five hundred twenty-one thousand, eighty-one".