1216253446 has 8 divisors (see below), whose sum is σ = 1887289920. Its totient is φ = 587156808.

The previous prime is 1216253443. The next prime is 1216253449. The reversal of 1216253446 is 6443526121.

It is an interprime number because it is at equal distance from previous prime (1216253443) and next prime (1216253449).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216253443) 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, 10484886 + ... + 10485001.

It is an arithmetic number, because the mean of its divisors is an integer number (235911240).

Almost surely, 2^1216253446 is an apocalyptic number.

1216253446 is a deficient number, since it is larger than the sum of its proper divisors (671036474).

1216253446 is a wasteful number, since it uses less digits than its factorization.

1216253446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20969918.

The product of its digits is 34560, while the sum is 34.

The square root of 1216253446 is about 34874.8253902439. The cubic root of 1216253446 is about 1067.4348095703.

Adding to 1216253446 its reverse (6443526121), we get a palindrome (7659779567).

The spelling of 1216253446 in words is "one billion, two hundred sixteen million, two hundred fifty-three thousand, four hundred forty-six".