1213025465 has 4 divisors (see below), whose sum is σ = 1455630564. Its totient is φ = 970420368.

The previous prime is 1213025413. The next prime is 1213025477. The reversal of 1213025465 is 5645203121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132457081 + 1080568384 = 11509^2 + 32872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213025465 - 2¹⁴ = 1213009081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121302542 + ... + 121302551.

It is an arithmetic number, because the mean of its divisors is an integer number (363907641).

Almost surely, 2^1213025465 is an apocalyptic number.

It is an amenable number.

1213025465 is a deficient number, since it is larger than the sum of its proper divisors (242605099).

1213025465 is an equidigital number, since it uses as much as digits as its factorization.

1213025465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242605098.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1213025465 is about 34828.5151133378. The cubic root of 1213025465 is about 1066.4896359308.

Adding to 1213025465 its reverse (5645203121), we get a palindrome (6858228586).

The spelling of 1213025465 in words is "one billion, two hundred thirteen million, twenty-five thousand, four hundred sixty-five".