1214444561 has 16 divisors (see below), whose sum is σ = 1379731968. Its totient is φ = 1058937600.

The previous prime is 1214444533. The next prime is 1214444579. The reversal of 1214444561 is 1654444121.

It is a cyclic number.

It is not a de Polignac number, because 1214444561 - 2¹⁴ = 1214428177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1214444531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22775 + ... + 54291.

It is an arithmetic number, because the mean of its divisors is an integer number (86233248).

Almost surely, 2^1214444561 is an apocalyptic number.

1214444561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1214444561 is a deficient number, since it is larger than the sum of its proper divisors (165287407).

1214444561 is a wasteful number, since it uses less digits than its factorization.

1214444561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31672.

The product of its digits is 15360, while the sum is 32.

The square root of 1214444561 is about 34848.8817754602. The cubic root of 1214444561 is about 1066.9053626728.

Adding to 1214444561 its reverse (1654444121), we get a palindrome (2868888682).

The spelling of 1214444561 in words is "one billion, two hundred fourteen million, four hundred forty-four thousand, five hundred sixty-one".