1240214216 has 8 divisors (see below), whose sum is σ = 2325401670. Its totient is φ = 620107104.

The previous prime is 1240214201. The next prime is 1240214219. The reversal of 1240214216 is 6124120421.

It can be written as a sum of positive squares in only one way, i.e., 1235241316 + 4972900 = 35146^2 + 2230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1240214191 and 1240214200.

It is not an unprimeable number, because it can be changed into a prime (1240214219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77513381 + ... + 77513396.

Almost surely, 2^1240214216 is an apocalyptic number.

It is an amenable number.

1240214216 is a deficient number, since it is larger than the sum of its proper divisors (1085187454).

1240214216 is a wasteful number, since it uses less digits than its factorization.

1240214216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155026783 (or 155026779 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1240214216 is about 35216.6752547710. The cubic root of 1240214216 is about 1074.3989330693.

Adding to 1240214216 its reverse (6124120421), we get a palindrome (7364334637).

The spelling of 1240214216 in words is "one billion, two hundred forty million, two hundred fourteen thousand, two hundred sixteen".