1245216349 has 8 divisors (see below), whose sum is σ = 1350651680. Its totient is φ = 1141159536.

The previous prime is 1245216347. The next prime is 1245216353. The reversal of 1245216349 is 9436125421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1245216349 - 2¹ = 1245216347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245216341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342747 + ... + 346360.

It is an arithmetic number, because the mean of its divisors is an integer number (168831460).

Almost surely, 2^1245216349 is an apocalyptic number.

It is an amenable number.

1245216349 is a deficient number, since it is larger than the sum of its proper divisors (105435331).

1245216349 is a wasteful number, since it uses less digits than its factorization.

1245216349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689259.

The product of its digits is 51840, while the sum is 37.

The square root of 1245216349 is about 35287.6231701712. The cubic root of 1245216349 is about 1075.8414465477.

The spelling of 1245216349 in words is "one billion, two hundred forty-five million, two hundred sixteen thousand, three hundred forty-nine".