1216753250 has 16 divisors (see below), whose sum is σ = 2277762552. Its totient is φ = 486701200.

The previous prime is 1216753207. The next prime is 1216753271. The reversal of 1216753250 is 523576121.

It can be written as a sum of positive squares in 4 ways, for example, as 286320241 + 930433009 = 16921^2 + 30503^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2433257 + ... + 2433756.

Almost surely, 2^1216753250 is an apocalyptic number.

1216753250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216753250 is a deficient number, since it is larger than the sum of its proper divisors (1061009302).

1216753250 is an equidigital number, since it uses as much as digits as its factorization.

1216753250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867030 (or 4867020 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1216753250 is about 34881.9903388554. The cubic root of 1216753250 is about 1067.5810058330.

The spelling of 1216753250 in words is "one billion, two hundred sixteen million, seven hundred fifty-three thousand, two hundred fifty".