1213625465 has 16 divisors (see below), whose sum is σ = 1578013248. Its totient is φ = 890709696.

The previous prime is 1213625443. The next prime is 1213625467. The reversal of 1213625465 is 5645263121.

It is a cyclic number.

It is not a de Polignac number, because 1213625465 - 2⁶ = 1213625401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213625467) 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, 46679 + ... + 67868.

It is an arithmetic number, because the mean of its divisors is an integer number (98625828).

Almost surely, 2^1213625465 is an apocalyptic number.

It is an amenable number.

1213625465 is a deficient number, since it is larger than the sum of its proper divisors (364387783).

1213625465 is a wasteful number, since it uses less digits than its factorization.

1213625465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114728.

The product of its digits is 43200, while the sum is 35.

The square root of 1213625465 is about 34837.1276801059. The cubic root of 1213625465 is about 1066.6654465589.

Adding to 1213625465 its reverse (5645263121), we get a palindrome (6858888586).

The spelling of 1213625465 in words is "one billion, two hundred thirteen million, six hundred twenty-five thousand, four hundred sixty-five".